Toilet bowl device

Abstract

To provide a technique capable of miniaturizing a toilet bowl device.SOLUTION: A toilet bowl device includes a toilet bowl body 14 having a toilet bowl part 12 and fixed to a floor surface F of a toilet room, a cavity part 28 provided behind the toilet bowl part 12 and configured to accommodate a functional component, a pair of outer wall parts provided with the cavity part 28 inside and arranged at an interval in a left-right direction, an upper opening 160 provided in the cavity part 28 and opened upward, and a rear opening 162 provided in the cavity part 28 and configured to open the upper opening 160 rearward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to toilet bowl systems. [Background technology]

[0002] A cavity for accommodating functional components may be provided behind the toilet bowl of the toilet body. For example, Patent Document 1 proposes a floor-standing toilet device that includes a toilet body that is fixed to the floor of a toilet room. In this toilet device, the left and right side walls and the rear wall of the toilet body form a cavity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-114631 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application have recognized that there is room for improvement in the technology disclosed in Patent Document 1 in order to reduce the size of floor-standing toilet devices.

[0005] One of the objects of the present disclosure is to provide a technique that can reduce the size of a floor-standing toilet device. [Means for solving the problem]

[0006] One aspect of the present disclosure to solve the above-mentioned problems is a toilet apparatus. The toilet apparatus of one aspect includes a toilet body having a toilet bowl and fixed to the floor of a toilet room, a cavity provided behind the toilet bowl and accommodating functional components, a pair of outer wall portions spaced apart on the left and right sides with the cavity provided inside, an upper opening provided in the cavity that opens upward, and a rear opening provided in the cavity that opens the upper opening rearward.

[0007] Another aspect of the present disclosure is a toilet apparatus, comprising: a toilet body having a toilet bowl and fixed to the floor of a toilet room; a cavity provided behind the toilet bowl and accommodating functional components; and a pair of outer wall portions, each of which is provided inside the cavity and spaced apart from the other, and whose rear ends abut against a wall portion of the toilet room. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a side view of a toilet apparatus according to a first embodiment. [Figure 2] 1 is a side cross-sectional view showing a part of a toilet apparatus according to a first embodiment. [Figure 3] 1 is a side cross-sectional view showing the toilet body of the first embodiment together with part of the surrounding structure. [Figure 4] FIG. 4 is a plan view showing the toilet body of FIG. 3 together with part of the surrounding structure. [Figure 5] FIG. 2 is a rear view showing the toilet body of the first embodiment together with the surrounding structure. [Figure 6] 1 is a structural diagram showing a part of a toilet apparatus according to a first embodiment. [Figure 7] FIG. 3 is a view showing a part of the cross section BB of FIG. 2. [Figure 8] 1 is a plan view showing a toilet body according to a first embodiment together with a functional device. [Figure 9] FIG. 2 is a plan view showing a high-level region and a low-level region of the first embodiment. [Figure 10A] FIG. 1 is a cross-sectional view of a vacuum breaker according to a first embodiment. [Figure 10B] FIG. 3 is another cross-sectional view of the vacuum breaker of the first embodiment. [Figure 11] FIG. 2 is an explanatory diagram of a divided region according to the first embodiment. [Figure 12] FIG. 4 is an enlarged view of a portion of FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along the line DD in FIG. [Figure 14A] FIG. 10 is a cross-sectional view of a second pipeline component member of a first modified example. [Figure 14B] FIG. 3 is a cross-sectional view of a second pipeline component member of the first embodiment. [Figure 15] 1 is a side cross-sectional view showing a toilet base of a first embodiment. FIG. [Figure 16] FIG. 2 is a side cross-sectional view showing a state during slip casting in the first embodiment. [Figure 17] FIG. 2 is a plan view schematically showing a state in which a counterpart device of the first embodiment is placed on the right side. [Figure 18] FIG. 18 is a side cross-sectional view showing a part of the toilet apparatus in the state shown in FIG. 17. [Figure 19] FIG. 18 is a rear view showing the toilet apparatus in the state shown in FIG. 17. [Figure 20] FIG. 18 is a plan view showing a part of the toilet apparatus in the state shown in FIG. 17. [Figure 21] FIG. 20 is an enlarged view of a portion of FIG. 19. [Figure 22] 22 is a cross-sectional view of FIG. 21 taken along the line E-E. [Figure 23] FIG. 2 is a plan view showing the toilet drainage channel of the first embodiment with the drain socket removed. [Figure 24] FIG. 3 is an explanatory diagram of a reference direction in the first embodiment. [Figure 25] FIG. 2 is a plan view schematically showing a state in which a counterpart device of the first embodiment is arranged on the left side. [Figure 26] FIG. 26 is a rear view showing the toilet apparatus in the state shown in FIG. 25. [Figure 27] FIG. 10 is a side cross-sectional view showing a part of a toilet apparatus according to a second embodiment. [Figure 28] FIG. 28 is a diagram showing a part of the FF cross section of FIG. 27. [Figure 29] FIG. 10 is a structural view showing a part of a toilet apparatus according to a second embodiment. [Figure 30] FIG. 10 is a side cross-sectional view of a toilet apparatus according to a second modified example. [Figure 31] FIG. 10 is a side cross-sectional view of a toilet apparatus according to a third modified example. [Figure 32] FIG. 10 is a side cross-sectional view of a toilet apparatus according to a fourth modified example. [Figure 33] FIG. 29 is a view of a toilet device of a fifth modified example, seen from the same perspective as in FIG. 28. [Figure 34]FIG. 10 is a structural diagram showing a part of a toilet apparatus according to a fifth modified example. [Figure 35] FIG. 13 is a plan view showing a part of a toilet apparatus according to a sixth modified example. [Figure 36] FIG. 13 is a rear view of a toilet apparatus according to a sixth modified example. [Figure 37] FIG. 13 is a plan view showing a part of a toilet apparatus according to a seventh modified example. [Figure 38A] FIG. 13 is a plan view showing a high-level region and a low-level region of an eighth modified example. [Figure 38B] FIG. 13 is a plan view showing a high-level region and a low-level region of a ninth modified example. [Figure 39] FIG. 23 is an explanatory diagram of a divided region of a tenth modified example. [Figure 40] FIG. 23 is a cross-sectional view showing the configuration around the second pipe connection portion of the eleventh modified example. [Figure 41] FIG. 23 is a cross-sectional view showing the configuration around the drain socket of the twelfth modified example. [Figure 42] FIG. 22 is a rear view schematically showing a toilet apparatus according to a thirteenth modified example. [Figure 43] FIG. 22 is a rear view showing a part of the toilet apparatus of the fourteenth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes the embodiments. Identical components are assigned the same reference numerals, and redundant explanations are omitted. In each drawing, components may be omitted, enlarged, or reduced as appropriate for the sake of convenience. The drawings should be viewed according to the orientation of the reference numerals. In this specification, "fixing," "connecting," and "applying" include cases where the stated conditions are met directly by two entities, as well as cases where the conditions are met via other members, unless otherwise specified.

[0010] (First embodiment) A first feature of the toilet apparatus 10 of the first embodiment will be described. Reference is made to Figures 1 and 2. The toilet apparatus 10 comprises a toilet body 14 having a toilet bowl 12, a drainage pipe 16 connected to the toilet bowl 12, a liquid supply device 18 that supplies liquid to the toilet body 14, and a toilet seat 20 and a toilet lid 22 that are attached to the toilet body 14.

[0011] The positional relationships of the components of the toilet apparatus 10 will be explained below using three mutually perpendicular directions. These directions are the front-to-rear direction X, the left-to-right direction Y, and the up-to-down direction Z. The front-to-rear direction X and the left-to-right direction Y are horizontal directions, and correspond to the front, back, left, and right of a person sitting in a normal posture on the toilet seat 20. The up-to-down direction Z is a vertical direction.

[0012] Please refer to Figures 3 to 5. The toilet body 14 of this embodiment is made of ceramic. There are no particular restrictions on the material of the toilet body 14, and it may be made of resin, for example. The toilet body 14 is a Western-style toilet, and in addition to the toilet bowl 12 for receiving waste, it is equipped with an upper surface 24 where the upper end opening of the toilet bowl 12 opens. The toilet body 14 of this embodiment is a floor-standing type that is placed on the floor F of the toilet room and is fixed to the floor F.

[0013] The toilet apparatus 10 of this embodiment has an outer peripheral wall 26 that surrounds the toilet bowl 12. The outer peripheral wall 26 of this embodiment is provided on the toilet body 14 as part of the toilet body 14. The outer peripheral wall 26 of this embodiment also surrounds the drainage pipe 16 and the liquid supply device 18, concealing the objects it surrounds (for example, the toilet bowl 12, etc.) from the outside. The outer peripheral wall 26 is exposed to the outside space before the toilet body 14 is fixed to the toilet room.

[0014] The outer peripheral wall 26 is provided so as to extend from the front of the toilet bowl 12, passing over both the left and right sides of the toilet bowl 12, and rearward beyond the toilet bowl 12. The outer peripheral wall 26 of this embodiment is continuous with the outer peripheral edge of the upper surface 24 of the toilet body 14. The toilet apparatus 10 of this embodiment is supported on the floor F by placing the outer peripheral wall 26 of the toilet apparatus 10 on the floor F.

[0015] The toilet apparatus 10 has a first cavity 28 provided behind the toilet bowl 12. The first cavity 28 is provided inside a pair of outer wall portions 30 that are spaced apart on the left and right and exposed to the outside space. The pair of outer wall portions 30 are formed by the outer peripheral wall portion 26. The first cavity 28 can also be considered to be provided inside the outer peripheral wall portion 26. The pair of outer wall portions 30 are integrated with the toilet body 14. In this embodiment, the first cavity 28 is divided into upper and lower portions by a partition member 32, which will be described later.

[0016] In this embodiment, the first cavity 28 is defined by a pair of outer wall portions 30 and a first partition wall portion 34 that forms the lower wall portion of the first cavity 28. In addition, the first cavity 28 is defined by a pair of first inner wall portions 36 that are provided inside the pair of outer wall portions 30, and a second inner wall portion 38 that hangs down from the upper surface portion 24 of the toilet body 14. The upper end of the first inner wall portion 36 is connected to the outer wall portions 30. The lower end of the first inner wall portion 36 is connected to the first partition wall portion 34. The front end of the first inner wall portion 36 is connected to the second inner wall portion 38.

[0017] The toilet apparatus 10 has a second cavity 40 provided below the toilet bowl 12. In addition to the outer peripheral wall 26 and first partition wall 34 of the toilet apparatus 10, the second cavity 40 is formed by a second inner wall 42 that hangs down from the underside of the toilet bowl 12. The lower end of the second inner wall 42 is connected to the outer peripheral wall 26.

[0018] Returning to Figure 2, the drain pipeline 16 is connected to a drain pipe 44 installed in a building. The drain pipe 44 in this embodiment is embedded in the floor surface F of the toilet room. The drain pipeline 16 includes a toilet drainage channel 46 provided in the toilet body 14. The drain pipeline 16 in this embodiment further includes a drain socket 48 that connects the toilet drainage channel 46 and the drain pipe 44, and a connecting pipe 50 that connects the toilet drainage channel 46 and the drain socket 48.

[0019] The drain pipe 16 is provided with an ascending pipe 54 that constitutes a seal water reservoir 52. The ascending pipe 54 rises toward the downstream side and extends rearward, and in this embodiment is provided in the toilet drain pipe 46. The seal water reservoir 52 stores seal water 56 that blocks air flow within the drain pipe 16.

[0020] The drain pipe 16 is provided with a downcomer pipe 58 that descends downstream from the upcomer pipe 54. In this embodiment, the downcomer pipe 58 extends vertically downward toward the downstream side, and is provided in the drain socket 48.

[0021] The drainage pipe 16 is provided with a connecting pipe 60 that connects the ascending pipe 54 and the descending pipe 58. In this embodiment, the connecting pipe 60 extends linearly backward as it heads downstream, and is provided in the connecting piping 50.

[0022] The drainage pipeline 16 includes a first pipeline component 62 that constitutes the drainage pipeline 16. In this embodiment, the first pipeline component 62 is the connection pipe 50. The first pipeline component 62 includes a cylindrical first pipe connection portion 66 that is provided at the downstream end of the first pipeline component 62. The first pipe connection portion 66 is connected to a first piping member 64. The first piping member 64 is arranged downstream of the first pipeline component 62. In this embodiment, the first piping member 64 is a drainage socket 48. The first pipe connection portion 66 is connected to the first piping member 64 by being inserted into the inside of the upstream end of the first piping member 64 (an upstream connection portion 68 described later).

[0023] The first pipe connection portion 66 of the drain pipe 16 extends rearward (see also Figure 3). This makes it possible to insert and remove the first pipe connection portion 66 into and from the first piping member 64 that has been pre-positioned at the intended placement position of the toilet apparatus 10 by moving the toilet body 14 in the front-to-rear direction X. In other words, by moving the toilet body 14 in this manner, the first pipe connection portion 66 can be connected to the pre-positioned first piping member 64. Therefore, when connecting the first pipe connection portion 66 to the pre-positioned first piping member 64, it is not necessary to significantly lift the toilet body 14 off the floor F. As a result, good workability is achieved.

[0024] The drain socket 48 includes an upstream connection portion 68 to which the first piping connection portion 66 of the first pipeline component 62 is connected, and a downstream connection portion 70 to which the drain pipe 44 is connected. The drain socket 48 of this embodiment includes an upstream pipe 72 to which the upstream connection portion 68 is provided, a downstream pipe 74 to which the downstream connection portion 70 is provided, and an adjuster pipe 76 that connects the upstream pipe 72 and the downstream pipe 74.

[0025] The upstream connecting portion 68 is formed with a socket 68a into which the first piping connecting portion 66 of the first conduit component 62 is inserted. In this embodiment, the socket 68a is formed in an elastic member 69 provided in the upstream connecting portion 68. The elastic member 69 is made of an elastic body. The first piping connecting portion 66 of the first conduit component 62 is watertightly connected to the upstream connecting portion 68 of the drain socket 48 via the elastic member 69.

[0026] The drain socket 48 is housed in each of the first cavity 28 and the second cavity 40 of the toilet apparatus 10. In this embodiment, the upstream piping 72 of the drain socket 48 is housed in the first cavity 28, and the adjuster pipe 76 and downstream piping 74 of the drain socket 48 are housed in the second cavity 40.

[0027] The adjuster pipe 76 has a straight pipe portion 76a extending in the front-to-rear direction X. The adjuster pipe 76 is connected by inserting the straight pipe portion 76a into the downstream piping 74. The drain socket 48 has an adjustable length in the front-to-rear direction so as to change the relative position of the upstream connection portion 68 and the downstream connection portion 70 in the front-to-rear direction. In this embodiment, this is achieved by cutting a portion of the straight pipe portion 76a of the adjuster pipe 76 and adjusting the front-to-rear dimension of the straight pipe portion 76a. This allows the relative position of the upstream connection portion 68 and the downstream connection portion 70 to be adjusted to match the positions of the toilet body 14 and the drain pipe 44, thereby expanding the range of compatible drain cores. Here, the "drain core" refers to the distance from a wall portion W rising from the toilet room floor F (hereinafter referred to as the toilet room wall portion W) to the center line CL1 of the upstream end opening of the drain pipe 44.

[0028] The toilet device 10 is provided with a jet discharge unit 80 that discharges water from a jet orifice 80a toward the downstream side of the drain pipe 16. The jet discharge unit 80 discharges water backward from the jet orifice 80a that opens into the inner wall surface of the drain pipe 16.

[0029] Refer to Figure 6. The toilet apparatus 10 comprises a liquid supply passage 90 that supplies liquid supplied from a liquid supply source to the toilet body 14, an on-off valve 92 provided in the liquid supply passage 90, and a check valve 94 provided in the liquid supply passage 90 upstream of the on-off valve 92. The toilet apparatus 10 also comprises a branch passage 96 that branches off from the liquid supply passage 90 upstream of the on-off valve 92, a pressure accumulator 98 connected to the liquid supply passage 90 via the branch passage 96, and a vacuum breaker 100 provided in the liquid supply passage 90 downstream of the on-off valve 92. Details of the vacuum breaker 100 will be described later.

[0030] In this embodiment, the liquid supply source is a water supply system. Water (hereinafter referred to as flush water) for flushing the toilet body 14 is supplied as the liquid to the liquid supply path 90. The on-off valve 92 is an electrically driven valve such as a solenoid valve or an electric valve, and can open and close the liquid supply path 90 under the control of a control unit (not shown).

[0031] The pressure accumulator 98 is one example of a liquid supply device 18 that supplies liquid to the toilet body 14. The liquid supply device 18 of this embodiment stores liquid supplied from the liquid supply path 90 and is capable of supplying the stored liquid to the toilet body 14. The liquid supply device 18 stores flushing water for flushing the toilet. The liquid supply device 18 includes an elongated main body 102 (see also FIG. 5 ), and the major axis of the main body 102 extends linearly. The main body 102 serves as a tank that stores the liquid supplied from the liquid supply path 90. The pressure accumulator 98 includes a partitioning member 108 such as a diaphragm that divides the inside of the main body 102 into a main chamber 104 and an auxiliary chamber 106, and a biasing member 110 such as a coil spring that biases the partitioning member 108 in the direction that reduces the volume of the main chamber 104.

[0032] When the on-off valve 92 is in a closed state, liquid can flow into the main chamber 104 of the pressure accumulator 98 from the liquid supply path 90 via the branch path 96. The hydrostatic pressure of the liquid flowing into the main chamber 104 causes the partition member 108 to move against the biasing force of the biasing member 110, gradually increasing the amount of liquid stored in the main chamber 104. The pressure accumulator 98 can accumulate pressure in the main chamber 104 using the biasing force of the biasing member 110. When the on-off valve 92 is in an open state, the pressure accumulator 98 can supply pressurized liquid from the main chamber 104 to the toilet body 14 via the liquid supply path 90 by moving the partition member 108 using the biasing force of the biasing member 110. As a result, the liquid stored in the pressure accumulator 98 merges with the liquid supplied from the liquid supply source, and high-pressure liquid can be supplied to the toilet body 14 via the liquid supply path 90.

[0033] Please refer to Figures 2, 5, and 7. In Figure 5, only a portion of the drain pipe 16 above the liquid supply device 18 is indicated by a two-dot chain line. In a side view, a first arrangement space 112 is provided behind the rising pipe 54 and overlapping with the rising pipe 54 in the front-to-back direction X, and below the drain pipe 16 and overlapping with the drain pipe 16 in the up-down direction Z. At least a portion of the main body 102 of the liquid supply device 18 is disposed in the first arrangement space 112. Here, "side view" is synonymous with viewing from the perspective of Figure 2, i.e., viewing from the left-to-right direction Y. When a specific viewpoint is mentioned, it refers to the positional relationship of each component when viewed from that viewpoint, regardless of the external and internal structures. In this embodiment, the first arrangement space 112 is provided inside the first cavity 28 of the toilet device 10.

[0034] The first arrangement space 112 is provided below a waterway top portion 314 (described later) of the drainage pipe 16. The first arrangement space 112 is provided between the ascending pipe 54 and the descending pipe 58 in a side view.

[0035] In the internal water passage 306 (described later) of the drainage pipeline 16, the deepest point on the inner upper surface of the seal water reservoir 52 is designated P1, the point directly below the deepest point P1 is designated P2, and the vertical center point between points P1 and P2 is designated P3. The main body 102 of the liquid supply device 18 is arranged so that at least a portion thereof is located above the aforementioned center position P3 of the internal water passage 306 in a side view. At least a portion of the main body 102 is arranged so that at least a portion thereof is located above a lower end position P4 of the jet orifice 80a in a side view. At least a portion of the main body 102 is arranged so that at least a portion thereof is located above a lower end position P5 of the seal water reservoir 52 of the drainage pipeline 16 in a side view.

[0036] The main body 102 of the liquid supply device 18 is provided so as to protrude from the first arrangement space 112 on both sides in the left-right direction Y. In other words, the main body 102 is provided so as to protrude in the left-right direction Y from a location that overlaps with the drainage pipe 16 in the up-down direction Z when viewed from behind. It is sufficient that the main body 102 protrudes on at least one side in the left-right direction Y.

[0037] The main body 102 of the liquid supply device 18 is arranged with its longitudinal direction facing the left-right direction Y. This condition is considered to be met when the main body 102 is arranged so that the angle between the longitudinal axis and the lateral axis Y is 30° or less. This allows the vertical and front-to-back dimensions of the area of ​​the toilet device 10 occupied by the main body 102 to be made smaller than when the main body 102 is arranged so that its longitudinal direction is aligned with the flow direction of the rising pipe 54 (see Figure 2) of the drain pipe 16. As a result, the front-to-back and vertical dimensions of the toilet device 10 can be made smaller.

[0038] The effects of the first ingenuity described above will now be explained.

[0039] (A1) The first arrangement space 112 behind the ascending pipe 54 is usually prone to becoming a dead space where it is difficult to arrange other components of the toilet apparatus 10. When the first arrangement space 112 is provided between the ascending pipe 54 and the descending pipe 58, the first arrangement space 112 is particularly prone to becoming a dead space. Because the liquid supply device 18 is arranged in the first arrangement space 112, which is prone to becoming such a dead space, the toilet apparatus 10 can be made more compact than if the liquid supply device 18 were arranged in another position.

[0040] One possible position for arranging the liquid supply device 18 is a space that avoids being below the toilet drainage channel 46, and is a third arrangement space 116 (see FIG. 5) that is behind the top of the toilet bowl 12 of the toilet body 14. According to this embodiment, it is not necessary to arrange the liquid supply device 18 in such third arrangement space 116, and therefore it is not necessary to shift the positions of other components (for example, functional parts 152, described below) up or down to avoid interference with the liquid supply device 18. As a result, the vertical dimension of the entire toilet device 10 can be reduced.

[0041] One possible location for arranging the liquid supply device 18 is below the bottom 52a (see FIG. 2) of the seal water reservoir 52 of the drainage pipeline 16. According to this embodiment, it is not necessary to arrange the liquid supply device 18 below the bottom 52a of the drainage pipeline 16, so that part of the drainage pipeline 16 can be arranged there, thereby improving the degree of freedom in terms of the arrangement location of the drainage pipeline 16.

[0042] The areas on both the left and right sides of the first arrangement space 112 are usually prone to becoming dead spaces where it is difficult to arrange other components of the toilet apparatus 10. The liquid supply device 18 of this embodiment is provided so as to protrude from the first arrangement space 112 in the left-right direction Y, and is disposed in such areas that tend to become dead spaces. This allows the toilet apparatus 10 to be made more compact than when the liquid supply device 18 is disposed in another position.

[0043] Next, other features related to the first innovation will be described. Refer to Figure 2. A second arrangement space 118 for arranging a portion of the drainage pipe 16 is provided below the liquid supply device 18. The second arrangement space 118 is provided below the liquid supply device 18, between the toilet body 14 and the floor F. In this embodiment, the second arrangement space 118 is provided so as to expand rearward from the bottom 52a of the seal water reservoir 52 of the drainage pipe 16. In this embodiment, the second arrangement space 118 is provided inside the second cavity 40 of the toilet apparatus 10.

[0044] (A2) By providing the second arrangement space 118 below the liquid supply device 18, it is possible to realize a design in which the drainage pipe 16 is arranged below it. Consequently, the degree of freedom in terms of the arrangement position of the drainage pipe 16 is improved.

[0045] (A3) In this embodiment, as "part of the drainage pipe 16," part of the drainage socket 48 is arranged in the second arrangement space 118. Therefore, the adjustment margin for the length of the drainage socket 48 in the front-to-rear direction can be increased by the amount of the second arrangement space 118, thereby expanding the range of compatible drainage cores.

[0046] 2 and 7. The toilet apparatus 10 includes a first partition wall 34 that separates the first arrangement space 112 and the second arrangement space 118. The first partition wall 34 is provided on the toilet body 14 as part of the toilet body 14. The first partition wall 34 is formed with a through-hole 120 that connects the first arrangement space 112 and the second arrangement space 118, and a portion of the drainage pipe 16 is inserted through the through-hole 120. Here, the "portion of the drainage pipe 16" refers to the descending pipe 58 of the drainage pipe 16 described above. In this embodiment, the through-hole 120 is a notched hole that opens rearward. The first partition wall 34 includes a first wall portion 34a that is connected to the ascending pipe 54 of the drainage pipe 16 and extends downward from the ascending pipe 54, and a second wall portion 34b that extends rearward from the lower end of the first wall portion 34a.

[0047] The toilet apparatus 10 is arranged below the liquid supply device 18 and includes a mounting portion 122 on which the liquid supply device 18 is placed. The mounting portion 122 in this embodiment is formed by the first partition wall portion 34. The mounting portion 122 in this embodiment is provided on the toilet body 14 as part of the toilet body 14. When placed on the mounting portion 122, the liquid supply device 18 is fixed to the mounting portion 122 via a fixing member 126 using a screw or the like (not shown). The liquid supply device 18 is arranged at a distance from the floor surface F and is supported by the toilet body 14 via the mounting portion 122.

[0048] (A4) This allows the liquid supply device 18 to be placed in the first arrangement space 112 simply by placing the liquid supply device 18 on the mounting portion 122. The liquid supply device 18 can be fixed in place with its weight resting on the mounting portion 122. These features combine to provide good workability when installing the liquid supply device 18.

[0049] Refer to Figure 3. The first arrangement space 112 described above is provided between the toilet drainage channel 46 and the first partition wall portion 34, i.e., between the toilet drainage channel 46 and the mounting portion 122. The toilet apparatus 10 is configured so that the liquid supply device 18 can be inserted and removed horizontally (in the front-to-rear direction X in this embodiment) with respect to the first arrangement space 112. In this embodiment, the liquid supply device 18 can be inserted and removed in this way when the drain socket 48 is removed from the drainage pipe 16. Here, "removable and insertable horizontally" does not mean that the insertion and removal direction of the liquid supply device 18 is along the horizontal direction, but rather that the horizontal component is greater than the vertical component. In this embodiment, an example will be described in which the insertion and removal direction of the liquid supply device 18 is the front-to-rear direction X.

[0050] The liquid supply device 18 can be inserted and removed by sliding relative to the mounting portion 122. The liquid supply device 18 can be inserted and removed through an entrance / exit 124 provided in the first hollow portion 28. In this embodiment, this entrance / exit 124 opens the first arrangement space 112 rearward, allowing the liquid supply device 18 to be inserted into the first arrangement space 112 from behind. The entrance / exit 124 is provided in the first hollow portion 28 between the first partition wall portion 34 and the partition member 32 of the toilet apparatus 10. The left-to-right dimension of the entrance / exit 124 is greater than the longitudinal dimension of the main body 102 of the liquid supply device 18. Here, the left-to-right dimension refers to the dimension of the entrance / exit 124 along the left-to-right direction Y, and the longitudinal dimension refers to the dimension along the longitudinal direction of the main body 102.

[0051] (A5) This allows the liquid supply device 18 to be placed on the placing portion 122 while the toilet body 14 is left resting on the floor surface F. Therefore, when placing the liquid supply device 18 on the placing portion 122, there is no need to lift or turn the toilet body 14 upside down, resulting in good operability.

[0052] (A6) The first piping connection portion 66 of the first pipeline component 62 is disposed above the first arrangement space 112. The first piping connection portion 66 is connected to the first piping member 64 (the drain socket 48 in this embodiment) provided at the rear of the first arrangement space 112. Therefore, when the first piping member 64 is removed from the drain pipeline 16, the liquid supply device 18 can be moved in and out horizontally, as described above. This means that when arranging the liquid supply device 18 in the first arrangement space 112, it is no longer necessary to arrange the liquid supply device 18 in the first arrangement space 112 from below the toilet body 14. This in turn results in good workability.

[0053] (A7) The portion where the first conduit component 62 and the first piping member 64 are connected is more likely to have a larger diameter than other portions of the first conduit component 62 and the first piping member 64. The first piping connection portion 66 of the first conduit component 62 located at such a portion is disposed above the first arrangement space 112, as described above. Therefore, it is not necessary to provide the first piping connection portion 66, which is more likely to have a larger diameter, at the rear of the first arrangement space 112. Accordingly, the first arrangement space 112 can be widened in the front-to-rear direction X compared to when the first piping connection portion 66 of the drainage conduit 16 is disposed at the rear of the first arrangement space 112.

[0054] Next, a second feature of the toilet apparatus 10 will be explained. Reference will be made to Figures 2 to 4 and 7. The toilet apparatus 10 of this embodiment comprises a functional device 150 mounted on the toilet body 14. The functional device 150 comprises a functional component 152 and a casing 154 that houses the functional component 152. The functional component 152 is a device that performs a predetermined function associated with the toilet body 14. The functional component 152 of this embodiment is a valve unit 153 that integrates the on-off valve 92, check valve 94, and vacuum breaker 100 in addition to the aforementioned liquid supply path 90 and part of the branch path 96. For ease of explanation, Figure 7 shows the liquid supply path 90 and branch path 96 schematically. In addition to the above, the functional component 152 may also be, for example, a private parts cleaning device that cleans the private parts of a person sitting on the toilet seat, a drying device that blows dry air onto the person sitting on the seat to dry them, a deodorizing device that sucks in and deodorizes odors within the toilet bowl 12, a foam supply device that supplies cleaning foam to the toilet body 14, etc.

[0055] The casing 154 includes a base plate 155 fixed to the toilet body 14, and a case cover 156 attached to the base plate so as to cover the base plate 155 from above. The functional component 152 is fixed to the base plate 155.

[0056] The toilet apparatus 10 includes the aforementioned first cavity 28 in which at least a portion of the functional component 152 is housed. The internal space of the first cavity 28 is divided by a partition member 32 into a third arrangement space 116 that houses the functional component 152 and a fourth arrangement space 117 that houses a portion of the drainage pipe 16 (see FIG. 5). The fourth arrangement space 117 is located below the third arrangement space 116 and includes the aforementioned first arrangement space 112. A valve unit 153 as the functional component 152 penetrates downward through a base plate 155 of a casing 154, and at least a portion of it is disposed in the third arrangement space 116. As a result, at least a portion of the functional component 152 is concealed by the first cavity 28, thereby improving the design.

[0057] The first cavity 28 is provided with an upper opening 160 that opens upward to the third arrangement space 116. The upper opening 160 opens to the top surface 24 of the toilet body 14. The functional component 152 of this embodiment is provided so as to straddle the upper opening 160 from above and below in a side view.

[0058] The first hollow portion 28 is provided with a first rear opening 162 that opens the upper opening 160 rearward. The first rear opening 162 opens the third arrangement space 116, in which the functional component 152 is disposed, rearward. The first rear opening 162 of this embodiment also opens the fourth arrangement space 117, which accommodates part of the drainage pipe 16, rearward. The first rear opening 162 of this embodiment is defined by the rear end of the outer peripheral wall portion 26 of the toilet apparatus 10, the rear end of the first inner wall portion 36, and the rear end of the first partition wall portion 34 described above.

[0059] The toilet apparatus 10 has the aforementioned second cavity 40 that houses the drain socket 48. The second cavity 40 is provided with a lower opening 164 that opens downward into the second arrangement space 118 inside it, and a part of the drain socket 48 is disposed inside the lower opening 164. The lower opening 164 is defined by the lower end of the outer peripheral wall portion 26 of the toilet apparatus 10.

[0060] The second cavity 40 is provided with a second rear opening 166 that opens the lower opening 164 rearward. The second rear opening 166 opens the second arrangement space 118, in which the drain socket 48 is arranged, rearward. In this embodiment, the second rear opening 166 is defined by the rear end of the outer peripheral wall 26 of the toilet apparatus 10, as well as the rear end of the first partition wall 34. The second rear opening 166 can also be considered to be defined by the rear ends of the pair of outer wall portions 30 and the rear end of the first partition wall 34.

[0061] The first cavity 28 does not have a rear wall separating the internal space of the first cavity 28 (the third arrangement space 116 and the fourth arrangement space 117 in this embodiment) from the external space in the front-rear direction X. In other words, the first cavity 28 is provided so that the functional component 152 and the drain socket 48 housed in the first cavity 28 are partially exposed to the outside without being covered when viewed from behind. The second cavity 40 does not have a rear wall separating the internal space of the second cavity 40 (the second arrangement space 118 in this embodiment) from the external space in the front-rear direction X. In other words, the second cavity 40 is provided so that the drain socket 48 housed in the second cavity 40 is partially exposed to the outside without being covered. The external space referred to here refers to the space provided outside the toilet apparatus 10 behind the cavities 28, 40 mentioned above when the toilet body 14 is not fixed to the toilet room.

[0062] The toilet body 14 is fixed to the floor surface F with the rear end portion 30a of the outer wall portion 30 of the toilet apparatus 10 abutting against the toilet room wall portion W. To achieve this, in this embodiment, a fixing member 170, which will be described next, is used.

[0063] Refer to Figure 7. In this embodiment, a pair of fixing members 170 are arranged with a gap between them on the left and right. The pair of fixing members 170 are arranged inside the pair of outer wall portions 30 of the toilet body 14. In this embodiment, the fixing member 170 has a floor fixing portion 170a that is arranged on the floor surface F, and a receiving portion 170b that rises from the floor fixing portion 170a, and is L-shaped overall. The floor fixing portion 170a is fixed to the floor surface F by a first screw member 172. A second screw member 174 that passes through the outer wall portions 30 of the toilet body 14 is screwed into the receiving portion 170b. The toilet body 14 is fixed to the floor surface F via the fixing members 170 and the screw members 172, 174.

[0064] Returning to Figure 2, in this embodiment, the rear end 30a of the outer wall 30 of the toilet apparatus 10 is abutted against the toilet chamber wall W via a cushion material 176 (see also Figure 1). This cushion material 176 is, for example, a sheet body made of a resin foam such as expanded polyethylene foam. The cushion material 176 is used to prevent foreign matter from entering from the external space and passing between the toilet chamber wall W and the outer wall 30.

[0065] In this embodiment, the cushion material 176 is provided in an area that avoids a notch 178, which will be described later, within the entire vertical range of the outer wall portion 30. The cushion material 176 is disposed at least between the outer wall portion 30 of the toilet apparatus 10 and the toilet room wall portion W. The cushion material 176 is also disposed, for example, rearward of the internal spaces of the first cavity 28 and the second cavity 40. In addition to this, the cushion material 176 is also disposed rearward of the casing 154. However, the cushion material 176 does not have to be disposed rearward of these.

[0066] The procedure for installing the toilet apparatus 10 of this embodiment will now be described. First, the drain socket 48 is connected to the drain pipe 44 that has been placed in advance. Next, the toilet body 14 is moved to connect the first piping connector 66, which is integrated with the toilet body 14, to the drain socket 48.

[0067] Here, as shown in Figure 3, the second cavity 40 of the toilet body 14 of this embodiment is provided with a second rear opening 166 that opens the lower opening 164 rearward. Therefore, by moving the toilet body 14 rearward, the drain socket 48 can be placed inside the lower opening 164 through the second rear opening 166 of the toilet body 14. To perform this operation, it is only necessary to move the toilet body 14 at a location close to the floor F. Therefore, there is no need to lift the toilet body 14 significantly from the floor F, resulting in good workability.

[0068] The effect of the second ingenuity mentioned above will now be described.

[0069] (B1) An upper opening 160 that opens upward is provided in the first cavity 28. Therefore, compared to when the functional component 152 is placed on the upper surface 24 of the toilet body 14, the vertical dimension of the entire floor-standing toilet apparatus 10 can be made smaller.

[0070] If a rear wall were provided in the first cavity 28 behind the functional component 152, it would be subject to shrinkage caused by drying during the molding process, which would likely result in large variations in its position. This problem is particularly likely to occur when the first cavity 28 is provided in a ceramic toilet body 14. For this reason, in order to absorb variations in the position of the rear wall of the first cavity 28, it is necessary to provide extra space (hereinafter referred to as variation-absorbing space) between the rear wall of the first cavity 28 and the functional component 152, which would result in an increase in the front-to-rear dimension of the entire toilet apparatus 10.

[0071] (B1) In this regard, according to this embodiment, the first cavity 28 is provided with a first rear opening 162 that opens the upper opening 160 rearward. This eliminates the need to provide a variation absorbing space behind the functional component 152, and also eliminates the need to provide a rear wall of the first cavity 28. This allows the front-to-rear dimension of the floor-standing toilet apparatus 10 to be reduced by the amount of the rear wall of the first cavity 28 and the variation absorbing space.

[0072] (B2) The toilet body 14 is fixed with the outer wall 30 of the toilet device 10 against the toilet room wall W. This prevents debris from entering from the external space through the gap between the outer wall 30 of the toilet device 10 and the toilet room wall W. This makes it difficult for debris to accumulate between the toilet device 10 and the toilet room wall W. This in turn makes it easier to keep the gap between them clean.

[0073] If the outer wall 30 of the toilet apparatus 10 were not in contact with the toilet room wall W, debris would easily accumulate between them. Therefore, in order to keep the space between them clean, it is necessary to ensure a front-to-rear dimension large enough to insert a cleaning tool, which would result in an increased projection dimension from the toilet room wall W to the front end of the toilet apparatus 10.

[0074] In this regard, according to this embodiment, in order to maintain a clean space between the toilet apparatus 10 and the toilet wall W, there is no need to insert a cleaning tool between them, and therefore there is no need to ensure a certain dimension between them. As a result, the projection dimension of the toilet apparatus 10 can be reduced in order to maintain a clean space between the toilet apparatus 10 and the toilet wall W.

[0075] In this way, when the outer wall 30 of the toilet apparatus 10 is abutted against the toilet room wall W, the position of the toilet body 14 in the front-to-rear direction relative to the toilet room wall W cannot be changed significantly. Therefore, even if the position of the drain core varies in the front-to-rear direction, the variation cannot be accommodated by changing the position of the toilet body 14. In this regard, the toilet apparatus 10 of this embodiment is equipped with a drain socket 48. Therefore, even if the position of the toilet body 14 cannot be changed, the drain socket 48 can be used to accommodate variations in the position of the drain core. This can be achieved by adjusting the length of the drain socket 48 in the front-to-rear direction, as described above. Alternatively, this can be achieved by adjusting the insertion amount of the first piping connection portion 66 of the first pipe component 62 into the upstream connection portion 68 of the drain socket 48.

[0076] The rear end 30a of the outer wall 30 of the toilet apparatus 10 is abutted against the toilet room wall W via a cushion material 176. Therefore, even if the position of the outer wall 30 of the toilet apparatus 10 varies relative to the toilet room wall W, this variation can be absorbed by the cushion material 176, making it possible to accommodate variation in the position of the toilet apparatus 10. Variation in the position of the toilet apparatus 10 here refers to, for example, a case where the rear end surface of the outer wall 30 of the toilet apparatus 10 is not parallel to the toilet room wall W but is oblique.

[0077] Next, other features related to the second ingenuity will be described. Refer to Figure 2. The rear end 30a of the outer wall 30 of the toilet apparatus 10 is aligned in the front-to-rear direction with the rear end 150a of the functional device 150 in a side view. In this embodiment, the rear end 150a of the functional device 150 is formed by the casing 154.

[0078] This prevents the functional device 150 from coming into contact with the toilet wall W first when the rear end 30a of the outer wall 30 of the toilet apparatus 10 is brought into contact with the toilet wall W, thereby protecting the functional device 150. To achieve the same effect, the rear end 30a of the outer wall 30 may be located further rearward than the rear end 150a of the functional device 150 in a side view.

[0079] See Figures 1 and 2. A notch 178 is formed in the rear end 30a of the outer wall 30, which connects the internal space (second arrangement space 118) of the toilet apparatus 10 with the external space. The notch 178 is open rearward. In this embodiment, the notch 178 is formed in the rear end of each of the lower portions 514 (described below) of the left and right outer wall portions 30. In this embodiment, the notch 178 is formed in the lower end of the outer wall 30, and is also open downward.

[0080] This cutout 178 can be used as a space for inserting an object to be inserted 180 that is arranged to straddle the internal and external spaces of the toilet apparatus 10. In this embodiment, the object to be inserted 180 is an object fixed to the toilet wall W, more specifically, a baseboard. In this embodiment, when the toilet apparatus 10 is placed against the toilet wall W, there is an advantage that the object to be inserted 180 can be easily inserted inside the cutout 178 by moving the toilet apparatus 10 backward. Alternatively, the object to be inserted 180 may be, for example, either a water supply pipe or a power supply cable.

[0081] See Figures 2 and 7. The toilet apparatus 10 of this embodiment is equipped with a second partition wall portion 182 arranged between the drainage pipe 16 and the functional component 152. The second partition wall portion 182 of this embodiment is constituted by a plate-shaped partition wall member 32 that is provided separately from the toilet body 14. Fixed portions 32a are provided on both left and right ends of the partition wall member 32, which are formed by bending a portion of the partition wall member 32. The fixed portions 32a are abutted against the wall portion (first inner wall portion 36 in this embodiment) that constitutes the first hollow portion 28 of the toilet body 14, and are integrated with the toilet body 14 by being fastened together with a fastener such as a screw member.

[0082] The second partition wall 182 vertically separates the fourth arrangement space 117, in which the drainage pipeline 16 is disposed, from the third arrangement space 116, in which the functional component 152 is disposed, within the first cavity 28. The second partition wall 182 is provided with a first recess 182a that is recessed upward in the middle in the left-right direction. A portion of the drainage pipeline 16, in this embodiment, the upstream piping 72 of the drainage socket 48, is disposed inside the first recess 182a. Second recesses 182b that are recessed downward are formed on both the left and right sides of the first recess 182a. A portion of the functional component 152 is disposed inside the second recess 182b. In a plan view, the functional component 152 is disposed in a position that overlaps the drainage pipeline 16 in the left-right direction Y.

[0083] This second partition wall portion 182 prevents external force from being applied to the drainage pipeline 16 due to contact between the functional component 152 and the drainage pipeline 16, and prevents the drainage pipeline 16 from coming off the drain pipe 44. In addition, it prevents unnecessary external force from being applied to the functional component 152, thereby protecting the functional component 152.

[0084] See Figures 3 and 5. A continuous opening 186 is formed in the outer peripheral wall 26 of the toilet apparatus 10, continuing from the upper opening 160 to the lower opening 164. The continuous opening 186 constitutes each of the first rear opening 162 and the second rear opening 166, and an opening that opens the through-hole 120 rearward. Here, "continuous" means that each of the left edge 186a and the right edge 186b of the continuous opening 186 is continuous from the upper opening 160 to the lower opening 164 by a single member. In this embodiment, the "single member" is the toilet body 14. In the continuous opening 186, the first rear opening 162 is provided above the first partition wall 34, and the second rear opening 166 is provided below the first partition wall 34.

[0085] This eliminates the need to provide a variation absorbing space behind the continuous opening 186 over the entire vertical length of the toilet body 14, and also eliminates the need to provide a rear wall of the toilet body 14. Therefore, the front-to-rear dimension of the floor-standing toilet device 10 can be reduced over the entire vertical length of the toilet body 14.

[0086] To achieve this effect, the single member that constitutes the left edge 186a of the continuous opening 186 may be separate from the single member that constitutes the right edge 186b of the continuous opening 186. For example, the left edge 186a may be formed by the toilet body 14, and the right edge 186b may be formed by a cover member 190 (described below).

[0087] A third feature of the toilet apparatus 10 will now be described. Reference is made to Figures 2 to 4 and 8. The toilet body 14 forms a rear space 220 behind the toilet bowl 12. In this embodiment, the rear space 220 is the third arrangement space 116 formed inside the first hollow portion 28 described above. The rear space 220 is open upward when only the toilet body 14 is fixed in the toilet room.

[0088] In this embodiment, a functional component 152 is arranged in the rear space 220. The functional component 152 arranged in the rear space 220 is an electrical component 204 equipped with electronic components. In this embodiment, the electrical component 204 is a valve unit 153 equipped with an on-off valve 92 as an electronic component. In addition, the electrical component 204 may be, for example, a local cleaning device, a drying device, a deodorizing device, or the like. In any case, specific examples of the electrical component 204 are not particularly limited.

[0089] The upper opening of the toilet bowl 12 forms an overflow lip 208. Here, the overflow lip 208 refers to a portion of the upper opening edge of the toilet bowl 12 that water attempting to overflow from within the toilet bowl 12 can overcome, and does not include a specific portion that the overflowing water cannot overcome. This specific portion refers, for example, to a portion S1 (see FIG. 8) of the upper opening edge of the toilet bowl 12 that is located in a position that overlaps the functional device 150 in the vertical direction. In this embodiment, the rear end 208a of the overflow lip 208 is located forward of the rear end 209 of the upper opening of the toilet bowl 12. Here, "water overflowing from within the toilet bowl 12" refers to, for example, a case in which the drain pipe 16 is clogged with waste or other objects.

[0090] 3 and 9, the upper surface portion 24 includes a boundary portion 222 provided at the boundary between the upper surface portion 24 and the rear space 220 in a plan view. The boundary portion 222 in this embodiment is the upper opening 160 of the first cavity portion 28 described above.

[0091] The upper surface 24 is provided with a high region 216 and a low region 218, which are different in height so that the overflow edge 208 of the toilet bowl 12 has a height difference. As a result, the overflow edge 208 has a low portion 208b below the height center Ch of the overflow edge 208. Here, the high region 216 refers to the portion above the height center Ch of the overflow edge 208, and the low region 218 refers to the portion below the height center Ch. Here, the height center Ch refers to the center position of the up-down range S2 of the overflow edge 208. In this embodiment, the high region 216 is located behind a boundary line Lb that passes through the overflow edge 208 and extends in the left-right direction Y, in a plan view, and the low region 218 is located forward of the boundary line Lb. The low region 218 can also be said to be located forward of the rear end 208a of the overflow edge 208. In this embodiment, the upper surface portion 24 is provided with an inclined surface 214, so that a high region 216 and a low region 218 are formed on the upper surface portion 24.

[0092] In this embodiment, the low region 218 is not connected to the boundary portion 222 of the upper surface portion 24 in a plan view, but is connected to the outer peripheral edge portion 24a of the upper surface portion 24 of the toilet body 14. This type of low region 218 can guide water that overflows over the low point 208b of the overflow edge 208 to the outside of the toilet body 14, passing over the low region 218, without passing through the rear space 220. Figure 9 shows the direction Pa in which water overflowing from the overflow edge 208 is guided. When the low region 218 is formed by an inclined surface 214 as in this embodiment, water passing over the low region 218 is guided to flow downward (upward on the paper surface in Figure 9) according to the gradient of the inclined surface 214.

[0093] The above-mentioned inclined surface 214 is provided on the upper surface 24 of the toilet body 14. The inclined surface 214 is provided so that its height continuously decreases toward the front. Here, "height" refers to the distance in the up-down direction from the horizontal plane passing through the floor surface F. In this embodiment, the inclined surface 214 is provided in the range from the front end 24b to the rear end 24c of the upper surface 24 of the toilet body 14. The inclined surface 214 is inclined so that the rear end 24c of the upper surface 24 is at its highest position and the front end 24b is at its lowest position. The inclined surface 214 is inclined uniformly over the entire range in the front-to-rear direction X. In other words, the inclined surface 214 is provided so that its gradient with respect to the horizontal plane is uniform over the entire range in the front-to-rear direction X.

[0094] The effect of the third ingenuity mentioned above will now be explained.

[0095] (C1) The low region 218 of the toilet body 14 can guide water that overflows over the low point 208b of the overflow edge 208 to the outside of the toilet body 14 without passing through the rear space 220. This makes it easier to prevent water that overflows from the toilet bowl 12 from flowing into the rear space 220. The low region 218 can guide water that overflows from the toilet bowl 12 to a space in front of or to the side of the toilet body 14. This space is larger than the rear space 220, making it easier to position parts of the user's body and cleaning tools. Therefore, even if water overflows from the toilet bowl 12, good cleanability can be achieved by guiding the water to such an easy-to-clean location.

[0096] In addition, it is easier to prevent the electrical components 204 arranged in the rear space 220 from getting wet due to water overflowing from the toilet bowl 12. Consequently, the electronic components mounted on the electrical components 204 can be protected.

[0097] The upper surface 24 of the toilet body 14 is provided with an inclined surface 214 that forms a high region 216 and a low region 218. This makes it less noticeable in appearance than when a step is provided to form the high region 216 and the low region 218. This in turn results in a good design.

[0098] The inclined surface 214 of the toilet body 14 is uniformly inclined. Therefore, there are no inflection points on the inclined surface 214 of the toilet body 14, resulting in a clean appearance and good design. When transporting the toilet base (described below) of the toilet body 14 and the toilet body 14 itself, the toilet body 14 may be turned upside down. In this case, the receiving surface of the cradle that comes into contact with the upper surface 24 of the toilet body 14 can be made flat, which has the advantage of making it easier to create the cradle.

[0099] The inclined surface 214 of the toilet body 14 is inclined so that its front end 24b is at its lowest position. Therefore, it is less noticeable in appearance than providing an inclined surface 214 that is inclined so that the middle position of the upper surface 24 in the front-rear direction X is at its lowest position, and a good design can be achieved.

[0100] Another feature of the third innovation will now be described. Refer to Figure 1. The toilet seat 20 is provided with a plurality of legs 20a that protrude downward from the underside of the toilet seat 20. The toilet seat 20 is supported on the inclined surface 214 of the toilet body 14 by placing the plurality of legs 20a on the inclined surface 214 of the toilet body 14. This inclined surface 214 is uniformly inclined. Therefore, even if the toilet seat 20 shifts in position in the front-to-rear direction X, the state of contact of the toilet seat 20 with the inclined surface 214 is unlikely to change. Therefore, the inclined surface 214 can support the toilet seat 20 more stably than if the inclined surface 214 of the toilet body 14 were not uniformly inclined.

[0101] Next, the vacuum breaker 100 will be described. See Figure 6. The vacuum breaker 100 is provided in the liquid supply line 90 downstream of the on-off valve 92. The vacuum breaker 100 is used to prevent backflow when negative pressure occurs in the liquid supply line 90 upstream of the vacuum breaker 100.

[0102] Please refer to Figures 10A and 10B. Figures 10A and 10B are cross-sectional views of the vacuum breaker 100 of Figure 2 and are also cross-sectional views taken along line CC of Figure 4. Figure 10A shows the valve body 240 in the outside air blocking position Pa1, and Figure 10B shows the valve body 240 in the outside air intake position Pa2. The vacuum breaker 100 comprises a main body 230 that forms part of the liquid supply path 90 therein. The main body 230 comprises an inlet path 232 through which flushing water flows in from the upstream side, an outlet path 234 through which flushing water flowing in from the inlet path 232 flows out, and an air vent 236 that connects the internal space of the outlet path 234 with the external space of the main body 230. The inlet path 232 is provided to extend vertically. The upstream portion of the outlet path 234 is provided to extend horizontally.

[0103] The main body 230 further includes a cylindrical portion 230a that protrudes upward from the inner lower surface of the outlet passage 234 and forms a part of the inlet passage 232 therein, and an inlet 232a of the inlet passage 232 that opens at the upper end of the cylindrical portion 230a. A valve seat 238 that forms the periphery of the inlet 232a is provided at the upper end of the cylindrical portion 230a.

[0104] The vacuum breaker 100 includes a valve element 240 housed in the main body 230. The valve element 240 is supported relative to the main body 230 so as to be able to move up and down. The valve element 240 is able to move between an outside air blocking position Pa1 (see FIG. 10A) and an outside air intake position Pa2 (see FIG. 10B) by moving up and down relative to the main body 230. When flush water is supplied from the inflow path 232, the valve element 240 is pushed up by the flush water flowing in from the inflow path 232, and moves from the outside air intake position Pa2 to the outside air blocking position Pa1. When flush water is not supplied from the inflow path 232, the valve element 240 moves downward due to its own weight, and moves from the outside air blocking position Pa1 to the outside air intake position Pa2.

[0105] 10A, when valve element 240 is in outside air blocking position Pa1, it moves away from valve seat 238 to open inlet 232a of inlet channel 232, thereby connecting inlet channel 232 with outlet channel 234. At this time, valve element 240 closes vent hole 236, blocking communication between the outside space and outlet channel 234. As a result, outside air is not taken into outlet channel 234 through vent hole 236, and flush water is supplied from inlet channel 232 to outlet channel 234.

[0106] 10B , when valve element 240 is in the outside air intake position Pa2, it contacts valve seat 238 to close inlet 232a of inflow path 232, thereby blocking communication between inflow path 232 and outflow path 234. At this time, valve element 240 opens vent hole 236, connecting the outside space with outflow path 234. As a result, outside air is taken into outflow path 234 through vent hole 236. Therefore, even when negative pressure occurs upstream of inflow path 232 in liquid supply path 90, backflow can be prevented by taking in outside air into outflow path 234 of liquid supply path 90.

[0107] As shown in FIG. 2 , the height of the overflow lip 208 that water overcomes when it begins to overflow from within the toilet bowl 12 is defined as Ha, and the height of the inlet 232a of the vacuum breaker 100 is defined as Hb. The greater the difference ΔH1 between the height Hb of the inlet 232a of the vacuum breaker 100 and the height Ha of the overflow lip 208, the more the head pressure equivalent to this difference acts on the water in the outlet channel 234 of the vacuum breaker 100, making it easier to prevent backflow in the liquid supply channel 90. Therefore, to ensure the required backflow prevention performance, regulations of the country in which the toilet apparatus 10 is sold typically require that the inlet 232a of the vacuum breaker 100 be located a predetermined distance above the overflow lip 208. For this reason, if the overflow lip 208 does not have a height difference, there is a limit to how low the top of the vacuum breaker 100 can be positioned.

[0108] In the toilet apparatus 10 of this embodiment, a high region 216 and a low region 218 are provided on the upper surface 24 so that the overflow lip 208 has a height difference ΔH2. Therefore, compared to when the entire overflow lip 208 is set to the same height as the maximum height Hc of the overflow lip 208, the height of the part of the overflow lip 208 that water must overcome when it begins to overflow from the toilet bowl 12 can be lowered by ΔH2. Accordingly, the position of the inlet 232a of the vacuum breaker 100 can be lowered by the amount of the height reduction by ΔH2. As a result, the position of the vacuum breaker 100 within the first cavity 28 can be lowered so that the position of the upper end of the vacuum breaker 100 is lower. Consequently, the vertical dimension of the toilet apparatus 10 can be reduced.

[0109] Next, the positional relationship of the discharge hole 250A that discharges flushing water into the toilet bowl 12 will be explained. Refer to Figure 3. As mentioned above, the top surface 24 of the toilet body 14 is arranged so that it becomes lower toward the front, which is one side in the front-to-rear direction X, so that the overflow edge 208 of the toilet bowl 12 has a height difference. The toilet bowl 12 has a rim portion 242 that forms the upper end portion of the toilet bowl 12. The inner circumferential surface of the rim portion 242 forms a part of the area extending downward from the upper end opening of the toilet bowl 12.

[0110] Refer to Figure 11. The toilet apparatus 10 is equipped with outlet portions 252A and 252B that discharge flushing water for cleaning the inside of the toilet bowl 12 from outlet holes 250A and 250B into the toilet bowl 12. In this embodiment, the outlet portions 252A and 252B form part of the toilet body 14. In other embodiments, the outlet portions 252A and 252B may be provided separately from the toilet body 14. The outlet portions 252A and 252B in this embodiment include a first outlet portion 252A that has a first outlet hole 250A and a second outlet portion 252B that has a second outlet hole 250B. The first outlet hole 250A and the second outlet hole 250B open to the inner circumferential surface of the toilet bowl 12, more specifically, the inner circumferential surface of the rim portion 242. The first outlet hole 250A and the second outlet hole 250B open to one side in the circumferential direction. Here, "one side in the circumferential direction" refers to the counterclockwise direction on the paper surface of FIG. 11, and hereinafter may also be simply referred to as "counterclockwise direction."

[0111] In this embodiment, discharge portions 252A, 252B include a water passage 254 formed on the outer periphery of toilet bowl 12. Each discharge portion 252A, 252B discharges flush water supplied from liquid supply passage 90 to water passage 254 counterclockwise from discharge holes 250A, 250B, forming a swirling flow that swirls counterclockwise inside toilet bowl 12. This swirling flow cleans the inner periphery of toilet bowl 12 and discharges waste from within toilet bowl 12 through drain pipe 16.

[0112] Here, in a plan view, assume a left-right center line Lc1 that bisects the left-right dimension Dy of the upper opening 12a of the toilet bowl 12, a front-to-back center line Lc2 that bisects the front-to-back dimension Dx, and an intersection point Pi between the left-right center line Lc1 and the front-to-back center line Lc2. The left-to-right center line Lc1 is a straight line extending in the front-to-back direction X, and the front-to-back center line Lc2 is a straight line extending in the left-to-right direction Y. The left-to-right dimension Dy refers to the maximum dimension in the left-to-right direction Y of the inner surface of the upper opening 12a of the toilet bowl 12. The front-to-back dimension Dx refers to the maximum dimension in the front-to-back direction X of the inner surface of the upper opening 12a of the toilet bowl 12. In a plan view, a first reference line Lc3 is assumed to be obtained by rotating the left-right center line Lc1 by 45° to one side in the circumferential direction around the intersection point Pi (counterclockwise in this embodiment), and a second reference line Lc4 is assumed to be obtained by rotating the left-right center line Lc1 by 45° to the other side in the circumferential direction around the intersection point Pi. Here, the "other side in the circumferential direction" refers to the clockwise direction on the paper surface of FIG. 11, and hereinafter will also be simply referred to as "clockwise."

[0113] The toilet bowl 12 is divided into eight divided regions Da1 to Da8 by the left-right center line Lc1, the front-rear center line Lc2, the first reference line Lc3, and the second reference line Lc4. In a plan view, the eight divided regions Da1 to Da8 are separate parts of the toilet bowl 12, separated by the lines Lc1 to Lc4. Of the eight divided regions Da1 to Da8, the divided region on the front side (in this embodiment, one side in the front-rear direction X) adjacent to the front-rear center line Lc2 in a counterclockwise direction is referred to as the first divided region Da1. Of the eight divided regions Da1 to Da8, the remaining divided regions arranged in order counterclockwise from the first divided region Da1 are referred to as the second to eighth divided regions Da2 to Da8, respectively.

[0114] In this case, the first discharge hole 250A is provided in one of the divided regions Da2 to Da5 on the opposite side of the second reference line Lc4 from the first divided region Da1. The first discharge hole 250A is provided in the third divided region Da3, which is a divided region that satisfies this condition. In this embodiment, the second discharge hole 250B is provided in the sixth divided region Da6. The advantages of this will be explained below.

[0115] Consider a case where the upper surface 24 of the toilet body 14 is provided so that the overflow edge 208 of the toilet bowl 12 has a height difference and becomes lower toward the front (one side in the front-to-rear direction in this embodiment). In this case, the rear portion of the rim 242 will usually have a wider vertical range than the front portion.

[0116] (C2) Here, in this embodiment, the first discharge hole 250A is provided in the divided region Da3 on the opposite side of the first divided region Da1 from the second reference line Lc4. Therefore, it is easier to have strong flush water reach the rear portion of the rim portion 242 than if the first discharge hole 250A were provided in the first divided region Da1 and the eighth divided region Da8. As a result, even when the vertical range to be washed is wide, such as the rear portion of the rim portion 242, it is easier to effectively wash that rear portion of the rim portion 242 with strong flush water.

[0117] To obtain the effects described herein, the first discharge holes 250A may be provided in the second divided region Da2, the fourth divided region Da4, and the fifth divided region Da5 in addition to the third divided region Da3. The position of the second discharge holes 250B is not particularly limited, and may not be present at all.

[0118] The fourth feature of the toilet apparatus 10 will now be described. Reference is made to Figures 12 and 13. The drainage pipe 16 comprises a second pipe component 300 and a second piping member 302. In this embodiment, the second pipe component 300 is the toilet body 14, and the second piping member 302 is the connecting pipe 50.

[0119] The second pipe component 300 is provided with the aforementioned seal water reservoir 52. The second pipe component 300 has a cylindrical second pipe connection portion 304 to which the second piping member 302 is connected. The second pipe connection portion 304 is provided at the downstream end of the portion of the second pipe component 300 that forms the drain pipe 16, in this embodiment, at the downstream end of the toilet drain path 46. The second pipe connection portion 304 extends rearward. In this embodiment, the outer circumferential surface of the second pipe connection portion 304 is circular and extends linearly. In order to form such a circular shape, it is sufficient that the outer circumferential surface of the second pipe connection portion 304 is circular as a whole, and at least one of a convex portion and a concave portion may be present on a portion of its circumference.

[0120] An internal waterway 306 is formed inside the drainage pipeline 16 and the drainage pipe 44 (not shown), through which waste and water discharged from the toilet bowl 12 pass. The second piping member 302 is provided downstream of the internal waterway 306 from the second pipeline component 300. The second piping member 302 is connected to the second piping connector 304 of the second pipeline component 300 by inserting the second piping connector 304 into the inside of the upstream portion of the second piping member 302. A seal member 308 is disposed between the second piping connector 304 of the second pipeline component 300 and the second piping member 302. The seal member 308 is an elastic member. In this embodiment, the seal member 308 is ring-shaped. The seal member 308 seals between the second piping member 302 and the second pipeline component 300.

[0121] The drainage pipeline 16 and the drainage pipe 44 have a water channel forming surface 310 that forms the internal water channel 306. An upward surface 312 that continuously rises toward the downstream side is provided on the inner lower surface of the water channel forming surface 310 of the seal water reservoir 52, inside the rising pipe 54. A peak 314 (hereinafter referred to as the water channel peak 314) is provided on the water channel forming surface 310 of the seal water reservoir 52 at the downstream end of the seal water reservoir 52. A part of the water channel peak 314 is formed by the upper end of the upward surface 312. In this embodiment, a straight region 318 that extends linearly toward the downstream side within the drainage pipeline 16 is provided on the water channel peak 314.

[0122] An overflow edge 316 is provided at the waterway top 314, which determines the maximum water level of the seal water 56 in a still water state. When water exceeds the overflow edge 316 and enters the drain pipe 16, the water overflows downstream from the overflow edge 316, thereby determining the maximum water level of the seal water 56 remaining in the drain pipe 16.

[0123] The waterway top 314 is provided inside the second pipe connection portion 304. A part of the upside 312 of the drainage pipe 16 (specifically, the downstream end portion) and an overflow edge 316 are provided inside the second pipe connection portion 304.

[0124] Consider a cross section (hereinafter referred to as a specific cross section) perpendicular to the flow direction passing through the waterway top 314. The flow direction here refers to the direction in which water flows downstream within the drainage pipe 16, and is the direction along the center line of the waterway forming surface 310 of the drainage pipe 16. Figure 13 is also a diagram showing the specific cross section of the second pipe component 300.

[0125] In the above-mentioned specific cross section, the second pipe component 300 comprises an outer peripheral wall portion 320 that forms the outer peripheral surface of the second piping connection portion 304 and separates the outside from the inside, a hollow portion 322 provided below the water channel forming surface 310, and a partition portion 324 that separates the internal space of the hollow portion 322 from the water channel forming surface 310. In this embodiment, the hollow portion 322 and the partition portion 324 are provided at the downstream end of the toilet drainage channel 46.

[0126] The axis C1 of the water channel forming surface 310 is eccentric upward relative to the axis C2 of the outer peripheral surface of the second pipe connecting portion 304 in the specific cross section. In this embodiment, the water channel forming surface 310 is provided with a first similar surface 326 that is similar in shape to a portion of the outer peripheral surface of the second pipe connecting portion 304 in the specific cross section. In this specification, "similar" means that the two mentioned are similar in shape as a whole, and there may be differences in their portions due to either convex or concave portions. In this embodiment, the first similar surface 326 includes the inner upper surface of the water channel forming surface 310 and is provided in a range that vertically straddles the axis C1 of the water channel forming surface 310.

[0127] In this embodiment, the water channel forming surface 310 is provided with a first dissimilar surface 328 that is dissimilar to the outer peripheral surface of the second pipe connecting portion 304 in a specific cross section. The first dissimilar surface 328 in this embodiment is provided on the inner lower surface of the water channel forming surface 310 and is continuous with both circumferential ends of the first similar surface 326. In this embodiment, the first dissimilar surface 328 forms the upper surface of the partition wall portion 324. In this embodiment, the first dissimilar surface 328 is a flat surface 330 that is parallel to the horizontal plane. In a specific cross section that passes through the water channel top portion 314, the inner lower surface of the water channel forming surface 310 is provided with a flat surface 330 that is parallel to the horizontal plane. The flat surface 330 is provided at the lowest point of the water channel forming surface 310 in the specific cross section. The flat surface 330 is provided over the entire flow direction of the linear region 318 described above. In this specification, "parallel" is not limited to being geometrically strictly parallel, but also includes being approximately parallel.

[0128] The hollow portion 322 opens to the downstream end surface 304a of the second pipe connecting portion 304 and has a bottom that terminates from the opening toward the rear. The hollow portion 322 is provided with a second similar surface 332 that is similar to a portion of the outer peripheral surface of the second pipe connecting portion 304 and a second dissimilar surface 334 that is dissimilar to the outer peripheral surface. In this embodiment, the second similar surface 332 is provided on the inner lower surface of the hollow portion 322, and the second dissimilar surface 334 is provided on the inner upper surface of the hollow portion 322. The second dissimilar surface 334 forms the lower surface of the partition portion 324 and is provided similarly to the first dissimilar surface 328 that forms the upper surface of the partition portion 324. Like the first dissimilar surface 328, the second dissimilar surface 334 in this embodiment is a flat surface parallel to the horizontal plane.

[0129] The outer peripheral wall portion 26 extends around the axis C2 with the same thickness in the circumferential range where the first similar surface 326 is provided. The outer peripheral wall portion 26 extends around the axis C2 with the same thickness in the circumferential range where the second similar surface 332 is provided. The partition wall portion 324 is provided with the same thickness as the outer peripheral wall portion 26 in a specific cross section.

[0130] The effect of the fourth ingenuity mentioned above will now be described.

[0131] A water channel top 314 of the seal water reservoir 52 is provided inside the second pipe connection 304 of the second pipe component 300. Therefore, compared to when the water channel top 314 is provided upstream of the second pipe connection 304 of the second pipe component 300, the front-to-rear dimension of the second pipe component 300 can be made smaller, and ultimately the front-to-rear dimension of the toilet apparatus 10 can be made smaller.

[0132] The axis C1 of the water channel forming surface 310 is offset upward with respect to the axis C2 of the outer peripheral surface of the second piping connection portion 304 in a specific cross section passing through the water channel top portion 314 of the seal water reservoir 52. Therefore, compared to when the outer peripheral surface of the second piping connection portion 304 and the entire water channel forming surface 310 are made similar in shape, the degree of freedom in designing the shape of the inner lower surface of the water channel forming surface 310 is increased. Accordingly, the outer peripheral surface of the second piping connection portion 304 can be made to have a shape suitable for connection with the second piping member 302, while the shape of the inner lower surface of the water channel forming surface 310 can be designed to achieve a different water flow pattern than when the outer peripheral surface of the second piping connection portion 304 is made similar in shape.

[0133] In this embodiment, to achieve these different water flow patterns, a flat surface 330 parallel to the horizontal plane is provided on the inner lower surface of the water channel forming surface 310. The advantages of this will be described in detail with reference to Figures 14A and 14B. Figure 14A is a cross-sectional view of a specific cross section of the second conduit component 300 of the first modified example, seen from the same perspective as Figure 13. In the second conduit component 300 of the first modified example, a concave curved surface similar to the outer peripheral surface of the second piping connection portion 304 is provided on the inner lower surface of the water channel forming surface 310 in the specific cross section passing through the water channel top portion 314.

[0134] As shown in Figures 14A and 14B, consider the case where the water level rises by a predetermined height H0 at a specific cross section passing through the water channel top 314 in the second conduit component 300 of the first modified example and the second conduit component 300 of the first embodiment. In this case, according to this embodiment, the flow rate of water attempting to overflow the water channel top 314 can be increased compared to the first modified example. This can also be understood from the fact that the area of ​​the hatched portion in Figure 14B is larger than the area of ​​the hatched portion in Figure 14A. Therefore, according to this embodiment, it is easier to ensure a large drainage flow rate when the water level attempting to overflow the water channel top 314 is low. The drainage flow rate here refers to the flow rate of water flowing through the drainage pipe 16.

[0135] The outer peripheral surface of the second pipe connection portion 304 of the second conduit component 300 is circular, as described above as "a shape suitable for connection with the second piping member 302." This makes it easier to stabilize the amount of elastic deformation of the seal member 308 disposed between the second piping member 302 and the second conduit component 300 regardless of its circumferential position, compared to when the outer peripheral surface of the second pipe connection portion 304 is polygonal. As a result, the sealing performance of the seal member 308 is stable regardless of its circumferential position. This in turn makes it easier to ensure stable sealing performance between the second piping member 302 and the second conduit component 300.

[0136] A hollow portion 322 is provided inside the second pipe connection portion 304 below the water channel forming surface 310 in a specific cross section. This allows for a weight reduction due to the presence of the hollow portion 322 compared to when the hollow portion 322 inside the second pipe connection portion 304 is a solid structure. In addition, compared to such a case, excess material is reduced around the hollow portion 322 of the second pipe connection portion 304. Accordingly, by suppressing the effects of sink marks and the like caused by excess material, the shape of the second pipe connection portion 304 can be stabilized.

[0137] This hollow section 322 is provided at the downstream end of the toilet drainage channel 46. As a result, during the cast molding of the toilet base, which will be described later, this hollow section 322 can be easily formed by placing a part of the rear mold 366 (see Figure 16) at a location in the toilet body 14 that corresponds to the hollow section 322.

[0138] Next, other features related to the fourth ingenuity will be described. See FIG. 12 . The water channel top 314 of the second conduit component 300 is provided with a water drop-off section 340 that gradually decreases in height toward the downstream side of the internal water channel 306. Here, "gradual" refers to the presence of a discontinuous difference in elevation in the internal water channel 306, with the water drop-off section 340 as the boundary. The water drop-off section 340 of this embodiment is provided to form a discontinuous difference in elevation between the inner lower surface of the second piping component 302 and the water channel top 314. The water drop-off section 340 can also be interpreted as being provided to form a step between them. The water drop-off section 340 of this embodiment is formed by the downstream end face of the second conduit component 300, and forms a corner 342 with the water channel top 314. The water drop-off section 340 can use gravity to drop water that overflows the water channel top 314.

[0139] As a result, water that has gone over the water channel crest 314 is dropped in the direction Pb using gravity downstream of the water drop section 340, making it easier for the water to flow downstream within the internal water channel 306 of the drainage pipe 16. As a result, the resistance of the water flowing within the drainage pipe 16 can be reduced compared to when there is no water drop section 340 at the water channel crest 314. This in turn makes it easier to ensure the drainage flow rate.

[0140] Next, the method for casting a toilet body will be described. See Figure 15. The toilet body is a semi-finished product required to obtain the ceramic toilet body 14, and is obtained by casting. The toilet body 350 of the toilet body 14 comprises an upper surface portion 352 that includes at least a portion of the upper surface 24 of the toilet body 14, and a toilet bowl side portion 354 that includes most of the toilet bowl 12 and is below the upper surface portion 352. The upper surface portion 352 and the toilet bowl side portion 354 form a shape that divides the toilet body 14 into upper and lower halves. The toilet drainage channel 46 and second piping connection portion 304 described above are provided in the toilet bowl side portion 354.

[0141] The toilet body 14 is obtained by casting the toilet bases of the top surface portion 352 and the toilet bowl side portion 354 by slip casting, joining them together by adhesive or the like, and then undergoing a firing process. Below, we will mainly explain the method of obtaining the toilet base for the toilet bowl side portion 354 by slip casting.

[0142] See Figure 16. Multiple molds 360, 362, 364, 366 are used for casting. The multiple molds 360, 362, 364, 366 are made of absorbent material such as plaster. In this embodiment, the molds 360, 362, 364, 366 include an upper mold 360 and a lower mold 362, which are arranged above and below the toilet base, and a front mold 364 and a rear mold 366, which are arranged in front and behind the toilet base. The front mold 364 is made up of a pair of left and right split molds (not shown). The front mold 364 and rear mold 366 form the exterior surface of the toilet bowl side portion 354.

[0143] The rear mold 366 forms at least a portion of the rear-facing portion of the toilet bowl side section 354. The rear mold 366 is equipped with a molding recess 370 that forms the second pipe connection portion 304 of the toilet drainage channel 46, and a molding protrusion 372 that forms the hollow portion 322. The molding recess 370 is formed in the front portion of the rear mold 366 and is recessed rearward. The molding protrusion 372 protrudes forward from the bottom of the molding recess 370.

[0144] Slip casting involves the following steps. First, multiple molds 360, 362, 364, and 366 are mated to form a mold space 374 for molding the toilet base. This is followed by a step of pouring unhardened slip 376 into the mold space 374. This step causes the slip 376 to harden along the surfaces of the molds 360, 362, 364, and 366, and the hardened portions of the slip 376 form the toilet base. This is followed by a step of ejecting the unhardened slip 376 remaining inside the hardened portions of the slip. This is followed by a step of demolding the molds 360, 362, 364, and 366 from the toilet base. In this step, the rear mold 366 is moved forward and backward relative to the toilet base, thereby removing the molding protrusion 372 of the rear mold 366 from the hollow portion 322 of the toilet base 350.

[0145] The molding recess 370 of the rear mold 366 forms a blocking wall 378 in the toilet base 350 that blocks the internal space of the toilet drainage channel 46 from the downstream side. After the demolding process described above, the blocking wall 378 of the toilet base 350 is cut away using fingers, tools, etc. while the toilet base is still soft before firing.

[0146] In this way, by using a rear mold 366 having a molding recess 370 and a molding protrusion 372, a toilet body 14 can be easily obtained in which a hollow portion 322 is provided inside the second piping connection portion 304 and below the water channel forming surface 310.

[0147] The fifth feature of the toilet apparatus 10 will now be described with reference to Figure 17. The toilet apparatus 10 comprises an accessory device 500 attached to the toilet body 14, and a cord-like member 504 that connects the accessory device 500 to an external counterpart device 502.

[0148] The accessory 500 of this embodiment is mounted on the toilet main body 14. It is a valve unit 153 (see FIG. 2, etc.) mounted on the toilet main body 14 of this embodiment via a casing 154. The accessory 500 of this embodiment is an electric machine that operates using an electrically powered power source. The power source of the valve unit 153 of this embodiment is the solenoid of the electrically powered on-off valve 92 (solenoid valve). The power source may also be, for example, a motor. The electric machine is not limited to the valve unit 153, and may be, for example, a private part washing device, a deodorizing device, a drying device, a foaming device, etc.

[0149] The accessory device 500 is placed on one side in the left-right direction (on the left side in this embodiment) of the left-right center position Px of the toilet body 14. This condition only needs to be met at least at the connection point of one end of the cord-like member 504 to the accessory device 500. The left-right center position Px here refers to a position on a plane extending in the front-rear direction X that bisects the maximum dimension in the left-right direction Y of the outer surface portion of the toilet body 14 in a plan view.

[0150] The counterpart device 502 is a connection partner of the accessory device 500. The counterpart device 502 in this embodiment is placed outside the toilet apparatus 10 in the toilet room. The counterpart device 502 in this embodiment is a stop valve provided on the liquid supply path 90 (see FIG. 6). The counterpart device 502 is placed on the other side in the left-right direction Y (the right side in this embodiment) of the left-right center position Px of the toilet body 14. The counterpart device 502 in this embodiment is placed outside in the left-right direction Y with respect to a position where it overlaps with the toilet apparatus 10 in the front-rear direction X.

[0151] Please refer to Figures 18 to 20. The partition member 32 is omitted in Figure 20. At least a portion of the accessory 500 of this embodiment is arranged in an internal space 506 provided inside the toilet apparatus 10. The internal space 506 is provided inside the outer peripheral wall portion 26. The internal space 506 of this embodiment includes the first arrangement space 112, second arrangement space 118, third arrangement space 116, and fourth arrangement space 117 described above, as well as the internal space of a hollow portion 520 described below. At least a portion of the accessory 500 of this embodiment is arranged in the third arrangement space 116 inside the first hollow portion 28. The accessory 500 of this embodiment is arranged in a position overlapping with the drainage pipe 16 in the left-right direction Y.

[0152] At least a portion of the accessory 500 is disposed above the channel top 314 of the drain pipe 16 in a side view. In order to satisfy this condition, the relative positions of the channel top 314 of the drain pipe 16 and the accessory 500 in the front-to-rear direction X do not matter. In this embodiment, the accessory 500 is disposed in a position that does not overlap with the drain socket 48 in a plan view. This condition is satisfied at least in the third arrangement space 116.

[0153] The cord-like member 504 is a flexible, long, cord-like object. The cord-like member 504 only needs to be cord-shaped as a whole, and may be composed of either a single member or multiple members. The cord-like member 504 of this embodiment is composed of a hose, and supplies water from a stop valve serving as the connected device 502 to the liquid supply path 90 within the accessory device 500. The cord-like member 504 is arranged to pass inside the outer peripheral wall 26 of the toilet apparatus 10. One end 504a of the cord-like member 504 is arranged in the internal space 506 of the toilet apparatus 10, and is mechanically connected to the accessory device 500. The other end of the cord-like member 504 is arranged outside the toilet apparatus 10, and is mechanically connected to the connected device 502.

[0154] The cord-like member 504 is arranged below the drain pipe 16 so as to cross in the left-right direction Y an overlapping position Pc where the cord-like member 504 overlaps with the drain pipe 16 in the up-down direction. The cord-like member 504 is arranged so as to cross in the left-right direction Y the first arrangement space 112 provided at the overlapping position Pc. The cord-like member 504 of this embodiment is arranged forward of the descending pipe 58 of the drain pipe 16 so as to cross a position where the cord-like member 504 overlaps with the descending pipe 58 in the front-rear direction X. The cord-like member 504 of this embodiment is arranged so as to cross in the left-right direction Y between the descending pipe 58 of the drain pipe 16 and the liquid supply device 18. The cord-like member 504 of this embodiment is arranged so as to be located above a portion of the drain socket 48 arranged in the second arrangement space 118. The portion of the drain socket 48 here refers to the adjuster pipe 76 and the downstream piping 74.

[0155] The cord-like member 504 of this embodiment is positioned so as not to pass behind the entire drainage pipe 16. At least a portion of the orthogonal cross section of the cord-like member 504 is positioned forward of the rear end 26a of the outer peripheral wall 26 of the toilet apparatus 10, over the entire area where it overlaps with the toilet body 14 in the front-rear direction X. The orthogonal cross section here refers to a cross section perpendicular to the axial direction of the cord-like member 504. This can also be interpreted as the entire orthogonal cross section of the cord-like member 504 being positioned so as not to be behind the rear end 26a of the outer peripheral wall 26 of the toilet apparatus 10, over the entire area where it overlaps with the toilet body 14 in the front-rear direction X.

[0156] The cord-like member 504 is connected to the accessory device 500 on one side in the left-right direction of the overlapping position Pc (the left side in this embodiment). The cord-like member 504 is arranged so as to cross the overlapping position Pc when placed on the mounting portion 122 of the toilet apparatus 10. The cord-like member 504 is pulled out from the inside of the outer peripheral wall portion 26 to the outside through a pull-out hole 516 (described later) on the other side in the left-right direction of the overlapping position Pc (the right side in this embodiment).

[0157] The rope-like member 504 is fixed to the mounting portion 122 using a fixing device 508. The fixing device 508 of this embodiment includes a clamp 508a that clamps the rope-like member 504, and a bolt 508b that detachably fixes the clamp 508a to the toilet body 14.

[0158] The cord-like member 504 is fixed to the toilet body 14 using a fixing device 508 on the other side in the left-right direction of the overlapping position Pc (the right side in this embodiment), similar to the position where it is pulled out to the outside from the pull-out hole 516. This makes it possible to prevent the cord-like member 504 from moving significantly inside the toilet body 14, even if the cord-like member 504 moves outside the toilet body 14. In addition to this, the cord-like member 504 of this embodiment is fixed to the toilet body 14 using a fixing device 508 on one side in the left-right direction of the overlapping position Pc (the left side in this embodiment).

[0159] From a similar perspective, the rope-like member 504 is fixed to the toilet body 14 using a fixing device 508 near the withdrawal hole 516. Here, "nearby" means, for example, within a distance of 10 cm from the withdrawal hole 516. In addition, there are no other locations where the rope-like member 504 can be caught between the position where the rope-like member 504 passes through the withdrawal hole 516 and the position where the rope-like member 504 is fixed by the fixing device 508.

[0160] See FIG. 19. The outer peripheral wall portion 26 has a downward step portion 510 provided at the lower portion of the outer peripheral wall portion 26. Here, the lower portion of the outer peripheral wall portion 26 refers to the range from the lower end position of the outer peripheral wall portion 26 to a position Pd where Lh is the overall length of the outer peripheral wall portion 26 in the up-down direction Z, where Lh is the total length of the outer peripheral wall portion 26. The step portion 510 in this embodiment is provided at the lower end portion of the outer peripheral wall portion 26. Here, the lower end portion of the outer peripheral wall portion 26 refers to the range from the lower end position of the outer peripheral wall portion 26 to a position Pe where Lh is the total length of the outer peripheral wall portion 26. In this embodiment, the step portion 510 is provided in the range from the front end portion to the rear end portion of each of the pair of outer wall portions 30 that constitute the outer peripheral wall portion 26.

[0161] The outer peripheral wall portion 26 includes an upper portion 512 extending upward from the outer peripheral edge portion 510a of the step portion 510, and a lower portion 514 provided below the step portion 510. The step portion 510 is provided so as to create a difference in outer dimension along the horizontal direction (left-right direction Y in this embodiment) between the upper portion 512 and the lower portion 514 of the outer peripheral wall portion 26.

[0162] 21, step portion 510 includes lower surface 510b continuing from outer peripheral edge portion 510a of step portion 510, recessed portion 510c recessed upward relative to lower surface 510b, and wall portion 510d separating internal space 506 from the external space. Wall portion 510d in this embodiment is provided at the bottom of recessed portion 510c.

[0163] The toilet apparatus 10 has an extraction hole 516 formed in the outer peripheral wall portion 26. As described above, the cord-like member 504 is extracted to the outside through the extraction hole 516. The extraction hole 516 is formed in the outer peripheral wall portion 26 in a range below the step portion 510. It is sufficient that at least a portion of the extraction hole 516 meets this condition. The extraction hole 516 in this embodiment is formed in the wall portion 510d of the step portion 510.

[0164] The withdrawal holes 516 are formed so as to avoid the outer surface of the upper portion 512. That is, the withdrawal holes 516 are not formed on the outer surface of the upper portion 512. The withdrawal holes 516 are formed so as to avoid the outer surface of the lower portion 514. That is, the withdrawal holes 516 are not formed on the outer surface of the lower portion 514.

[0165] See Figures 19 and 21. In addition to the aforementioned first cavity 28 that houses the accessory 500, the toilet body 14 also has a hollow section 520 (see also Figure 4) that is provided above the step section 510 between the first cavity 28 and the outer peripheral wall 26. The internal space of the hollow section 520 is where the mold is not placed during cast molding. The internal space of this hollow section 520 is where the unhardened slip remains when the slip hardens to take a shape corresponding to the shape of the molded product during cast molding. The hollow section 520 has a rear wall 520a that covers the internal space of the hollow section 520 from the rear.

[0166] The toilet apparatus 10 includes the aforementioned first inner wall portion 36 that separates the internal space of the first cavity portion 28 from the internal space of the hollow portion 520, and an insertion hole 522 formed in the first inner wall portion 36. The first cavity portion 28 includes an inner bottom surface 28a, an inner side surface 28b that rises from the inner bottom surface 28a, and an inner corner portion 28c where the inner bottom surface 28a and the inner side surface 28b intersect. In this embodiment, the insertion hole 522 is formed in the inner corner portion 28c.

[0167] The cord-like member 504 passes through the first cavity 28, the insertion hole 522, and the hollow portion 520, and is then drawn out from the drawing hole 516 to the outside. The cord-like member 504 is drawn out from the drawing hole 516 to the outside without passing through the second cavity 40, which is provided horizontally inward of the stepped portion 510.

[0168] See Figures 19 and 22. The extraction hole 516 has an opening 526 that opens in a direction intersecting the axial direction of a portion of the cord-like member 504 disposed within the extraction hole 516. In this embodiment, the "intersecting direction" refers to the horizontal direction, specifically the rearward direction. In this embodiment, the opening 526 is continuous with the extraction hole 516, as well as with the rear wall portion 520a of the hollow portion 520 and the insertion hole 522, which also open toward the external space. The intermediate portion of the cord-like member 504 in the axial direction can be inserted and removed in the direction Pf through the opening 526 between the extraction hole 516 and the external space. This direction Pf intersects with the axial direction of the portion of the cord-like member 504 disposed within the extraction hole 516.

[0169] The cord-like member 504 of this embodiment is inserted through a through hole 528 formed in the partition member 32. The through hole 528 also has an opening 530 that opens in a direction intersecting the axial direction of a portion of the cord-like member 504 disposed within the through hole 528.

[0170] See Figure 23. In this embodiment, in the following state, the cord-like member 504 can be inserted and removed in the direction Pf through the opening 526 between the withdrawal hole 516 (not shown) and the external space. This state is the state in which the drain socket 48 has been removed from the toilet drainage channel 46 and before the toilet body 14 has been fixed to the toilet room. At this time, the cord-like member 504, together with the accessory device 500 to which the cord-like member 504 is connected, is moved relative to the toilet body 14. In this embodiment, the accessory device 500 is moved relative to the toilet body 14 together with the casing 154 (not shown) of the functional device 150 to which the accessory device 500 is fixed.

[0171] The effects of the fifth ingenuity mentioned above will now be explained.

[0172] The cord-like member 504 is arranged so as to cross in the left-right direction at a position where it overlaps with the drain pipe 16 in the vertical direction. Therefore, even when the accessory device 500 and the counterpart device 502 are arranged on both the left and right sides of the left-right center position Px of the toilet body 14, there is no need to secure space for the cord-like member 504 behind the drain pipe 16. As a result, the toilet body 14 can be brought closer to the toilet room wall W, realizing a reduction in the forward projection dimension of the toilet apparatus 10. In addition, the drain socket 48 can be brought as close as possible to the toilet room wall W, thereby widening the range of compatible drain cores.

[0173] The cord-like member 504 is positioned below the drainage pipe 16 so as to cross a position that overlaps the drainage pipe 16 in the vertical direction. Therefore, no space is required above the drainage pipe 16 for arranging the cord-like member 504, and this space can be used as arrangement space for other accessories to the toilet apparatus 10. In addition, the area below the drainage pipe 16 that tends to become dead space can be used as arrangement space for the cord-like member 504. Therefore, space saving can contribute to the miniaturization of the toilet apparatus 10.

[0174] The cord-like member 504 is disposed in front of the descending pipe 58 of the drain pipe 16 so as to cross a position overlapping with the descending pipe 58 in the front-rear direction X. When the drain pipe 16 is provided with the descending pipe 58, the area in front of the descending pipe 58 is more likely to become dead space. According to this embodiment, this area that is likely to become dead space can be used as an arrangement space for the cord-like member 504. This space saving can therefore contribute to further miniaturization of the toilet apparatus 10.

[0175] (F) The withdrawal hole 516 is formed in the outer peripheral wall 26 in a range below the downward stepped portion 510. Consider the case where the withdrawal hole 516 is formed in a portion of the outer peripheral wall 26 that is smoothly continuous in the vertical direction without any steps (for example, the upper portion 512). Compared to this case, the withdrawal hole 516 is hidden by the upper portion 512 of the outer peripheral wall 26, making it difficult to see when observing the toilet apparatus 10 from the outside. This effect is particularly effective when the withdrawal hole 516 is formed in the stepped portion 510 of the outer peripheral wall 26. As a result, the appearance of the toilet apparatus 10 is easier to keep neat, and the design of the toilet apparatus 10 can be improved.

[0176] The withdrawal hole 516 is formed in the lower part of the outer peripheral wall portion 26. Therefore, it is difficult for a user in a standing position to see the withdrawal hole 516 compared to when the withdrawal hole 516 is formed in the upper part of the outer peripheral wall portion 26. Accordingly, the cord-like member 504 withdrawn to the outside from the withdrawal hole 516 can also be made difficult to see, resulting in a good design.

[0177] An accessory having an outer diameter larger than that of the rope-like member 504 may be attached to a portion of the rope-like member 504. For example, this accessory is a connector when the rope-like member 504 is a hose. For example, the accessory is a socket when the rope-like member 504 is a cable. Depending on the size of the accessory, the accessory may get caught on the periphery of the outlet hole 516. Therefore, depending on the size of the accessory, there may be cases where the rope-like member 504 cannot be inserted into the outlet hole 516 from its end.

[0178] In this regard, the middle portion of the cord-like member 504 in this embodiment can be inserted and removed through the opening 526 of the extraction hole 516. Therefore, the cord-like member 504 can be placed inside the extraction hole 516 regardless of the size of the accessory member.

[0179] Consider a case where a step 510 is provided in the rear wall of the outer peripheral wall 26, and an extraction hole 516 is formed in the step 510. In this case, space is required between the outer peripheral wall 26 and the toilet room wall W to accommodate the cord-like member 504 extracted from the extraction hole 516.

[0180] In this regard, in this embodiment, a step 510 is provided in the outer wall portion 30 of the outer peripheral wall portion 26, and a withdrawal hole 516 is formed in the step 510. This eliminates the need to provide a rear wall portion in the outer peripheral wall portion 26. As a result, the range of drain cores that can be accommodated by the drain socket 48 can be expanded by the amount of the rear wall portion of the second cavity portion 40.

[0181] The withdrawal hole 516 is formed so as to avoid the outer surface of the upper portion 512. This makes it even more difficult to see the withdrawal hole 516 when observing the toilet apparatus 10 from the outside. As a result, the design of the toilet apparatus 10 can be further improved.

[0182] The hollow portion 520 of the toilet body 14 is usually a location where a mold is not placed during cast molding, and is prone to becoming dead space. In this embodiment, the cord-like member 504 is pulled out to the outside from the pull-out hole 516 via this hollow portion 520. Therefore, a location that would easily become dead space can be used as space for arranging the cord-like member 504. This contributes to the miniaturization of the toilet apparatus 10 through space savings.

[0183] Another feature of the fifth ingenuity will now be described. Refer to FIG. 24. One of the front-rear direction X and the left-right direction Y is referred to as the specific direction. In this embodiment, the specific direction is the left-right direction Y. The outer peripheral wall 26 includes the aforementioned outer wall 30 as an outer wall 532 facing outward in the specific direction (the left-right direction Y in this embodiment). The outer wall 532 separates the internal space 506 of the device from the external space in the specific direction.

[0184] A cross section cut along a specific direction (left-right direction Y in this embodiment) so as to pass through the extraction hole 516 is referred to as a specific cross section. FIG. 24 shows the specific cross section. In this specific cross section, the downward direction along a reference plane Ps that forms an angle of 60° with respect to the horizontal plane Ph is referred to as a reference direction Pg. This reference plane Ps is a plane that extends downward as it moves inward in the specific direction. This reference direction Pg is assumed to be the line of sight of the user. When this reference plane Ps contacts the outer peripheral edge portion 510a of the stepped portion 510, the range inside the upper portion 512 of the outer wall portion 532 and above the reference plane Ps is positioned in a position hidden by the upper portion 512 of the outer wall portion 532.

[0185] In this case, the withdrawal hole 516 is positioned in a position hidden by the upper portion 512 of the outer wall portion 532 when viewed from the reference direction Pg on this specific cross-sectional surface. In other words, the withdrawal hole 516 is positioned in a position that is not visible when viewed from the reference direction Pg on the specific cross-sectional surface. This makes it even more difficult to see the withdrawal hole 516 when observing the toilet apparatus 10 from the outside. This further enhances the design of the toilet apparatus 10.

[0186] This reference direction Pg is set based on the following concept. A lateral space 534 is formed between the toilet body 14 and the toilet wall W, which is located to the side of the toilet body 14. The distance from the lateral center position Px of the toilet body 14 to the toilet wall W is usually at most 435 mm. Consider the case where an adult woman of average build kneels and bends forward to clean this lateral space 534 as a work space. This adult woman is assumed to be 160 cm tall, and her viewpoint is assumed to be 40 cm (160 cm x 0.25) above the floor F. In this case, the position from which the extraction hole 516 formed at the lower end of the outer wall 532 is most easily visible is when this viewpoint Vp is on the toilet wall W.

[0187] Assuming that a viewpoint Vp is located here, and a reference plane Ps' that passes through the viewpoint Vp and is tangent to the outer peripheral edge 510a of the stepped portion 510 is defined as a reference plane Ps', the angle θ0 of this reference plane Ps' with respect to the horizontal plane Ph is, for example, 56.5°. In this case, the range above the reference plane Ps' is located in a position hidden by the upper portion 512 of the outer wall portion 532 when viewed from the viewpoint Vp. In other words, if the extraction hole 516 is located inside the upper portion 512 of the outer wall portion 532 and above the reference plane Ps', the extraction hole 516 will be invisible when an adult of average build is cleaning.

[0188] Based on this idea, 60° is set as the angle at which visibility becomes more difficult than angle θ0, and the concept set from this angle becomes the reference direction Pg mentioned above. If the pull-out hole 516 is positioned in an unvisible position when viewed from this reference direction Pg, it can be considered that the pull-out hole 516 will be unvisible when an adult of average build cleans. This cleaning location is assumed to be a lateral space 534 to the side of the toilet body 14. A similar effect can also be obtained in a space behind the toilet body 14 that is narrower than this lateral space 534.

[0189] Additionally, the second screw member 174 is disposed at a position hidden by the upper portion 512 of the outer wall portion 532 when viewed from the reference direction Pg on this specific cross section. Similarly, the lower portion 514 of the outer wall portion 523 is disposed at a position hidden by the upper portion 512 of the outer wall portion 532 when viewed from the reference direction Pg on this specific cross section.

[0190] The placement position of the counterpart device 502 varies depending on the installation location of the toilet apparatus 10. Fig. 17 shows an example in which the counterpart device 502 is placed on the other side in the left-right direction Y (the right side in this embodiment) of the left-right center position Px of the toilet body 14. Fig. 25 shows an example in which the counterpart device 502 is placed on one side in the left-right direction Y (the left side in this embodiment) of the left-right center position Px of the toilet body 14. A structure to accommodate this example will be described below.

[0191] See Figures 19 and 26. The pull-out holes 516 are provided on both the left and right sides of the left-right center position Px of the toilet body 14. In this embodiment, the hollow portions 520 and insertion holes 522 are also provided on both the left and right sides of the left-right center position Px. When the mating device 502 is disposed in the position shown in Figure 17, the cord-like member 504 is arranged to pass through the pull-out hole 516 on the right side, as well as the internal space of the right hollow portion 520 and the insertion hole 522. When the mating device 502 is disposed in the position shown in Figure 25, the cord-like member 504 is arranged to pass through the pull-out hole 516 on the left side, as well as the internal space of the left hollow portion 520 and the insertion hole 522. In either case, the accessory device 500 remains disposed on one side (the left side in this embodiment) in the left-right direction with respect to the left-right center position Px. This allows the cord-like member 504 to be pulled out from the internal space 506 to the outside, regardless of the position of the mating device 502 in the left-right direction.

[0192] From the viewpoint of protecting the functional component 152 in the event of a fire, it is preferable to be able to prevent flames from entering the third arrangement space 116 that houses the functional component 152. From this viewpoint, it is preferable to adopt the following configuration.

[0193] The partition member 32 is made of a non-combustible material hard enough to maintain a certain shape. For example, the partition member 32 is made of a metal such as iron, ceramic, or the like. The cushioning material 176 may be made of a non-combustible material. For example, the cushioning material 176 may be made of a non-combustible fiber material such as glass wool or rock wool. At least one of the extraction hole 516, the insertion hole 522, and the through-hole 528 may be covered with a non-combustible and flexible lid material. To achieve this, the lid material may be sandwiched between the accessory 500 and the partition member 32 (see area S3 in FIG. 19 ). For example, a fibrous material similar to that of the cushioning material 176 may be used as the lid material. The portion of the accessory 500 where the lid material is sandwiched may be made of a non-combustible material hard enough to maintain a certain shape, similar to the partition member 32.

[0194] (Second embodiment) See Figures 27 to 29. The toilet apparatus 10 of this embodiment is mainly related to the first ingenuity mentioned above. The liquid supply apparatus 18 of this embodiment is a tank apparatus 402 equipped with a tank 400. In addition to the tank 400 that stores the liquid L to be supplied to the toilet body 14, the tank apparatus 402 is equipped with tank units 404A and 404B that are provided on a liquid path leading to the tank 400. The tank units 404A and 404B of this embodiment include a valve unit 404A as a first tank unit and a pump unit 404B as a second tank unit.

[0195] The valve unit 404A is provided on a first liquid path 406A, which serves as a liquid path leading to the tank 400 and supplies liquid from a liquid supply source to the tank 400. The liquid supply source in this embodiment is a tap water supply, as in the first embodiment, and supplies water as the liquid L. The valve unit 404A includes an on-off valve 408 and a first piping section 410A that constitutes the downstream end of the first liquid path. The on-off valve 408 is an electrically driven valve such as a solenoid valve, and is capable of opening and closing the first liquid path 406A under the control of a control section (not shown). When the on-off valve 408 is in an open state, the liquid L flows into the tank 400 through the first piping section 410A.

[0196] The pump unit 404B is provided on a second liquid path 406B, which serves as a liquid path leading to the tank 400 and supplies liquid L from the tank 400 to the toilet body 14. The pump unit 404B includes a pump 412 and a second piping section 410B that forms the upstream end of the second liquid path 406B. The pump 412 can pump out liquid sucked from the tank 400 through the second liquid path 406B under the control of a control section (not shown).

[0197] An example of the operation of the toilet apparatus 10 related to the tank apparatus 402 described above will now be described. The toilet apparatus 10 is equipped with a float switch (not shown) that detects whether the liquid level of the liquid L stored in the tank 400 has exceeded a set liquid level. When the control unit determines, based on the detection result of the float switch, that the liquid level in the tank 400 is equal to or lower than the set liquid level, it switches the on-off valve 408 from a closed state to an open state. As a result, the liquid L is supplied into the tank 400 through the first liquid path 406A.

[0198] When the control unit determines, based on the detection result of the float switch, that the liquid level in the tank 400 has exceeded the set liquid level, it switches the on-off valve 408 from an open state to a closed state. This stops the supply of the liquid L through the first liquid path 406A into the tank 400. By going through the above series of operations, the set amount of the liquid L is stored in the tank 400.

[0199] The control unit starts driving the pump 412 when a predetermined start condition is met. This start condition is, for example, input of a liquid supply start signal through operation of a switch or the like (not shown). When the pump 412 is driven, the liquid L in the tank 400 is supplied through the second liquid path 406B. When a predetermined time has elapsed since the control unit started driving the pump 412, the control unit stops driving the pump 412. Through the above series of operations, a set amount of liquid L is supplied from the tank 400.

[0200] The tank 400 will now be described in detail. The tank 400 is positioned at a distance from the toilet bowl 12 of the toilet body 14 and the toilet drainage channel 46. The toilet body 14 may vary in shape due to shrinkage that accompanies drying during the molding process. For this reason, if the tank 400 is positioned in contact with the toilet bowl 12 of the toilet body 14 and the toilet drainage channel 46, it may be difficult to position the tank 400 in the desired position if there is significant variation in the shape of the toilet bowl 12, etc. In this regard, according to the present embodiment, the tank 400 is positioned at a distance from these, thereby eliminating the effects of variation in the shape of the toilet bowl 12, etc.

[0201] The tank 400, like the toilet bowl 12 of the toilet body 14 and the toilet drainage channel 46, is concealed from the outside by the outer wall 26 of the toilet apparatus 10. Let us consider a case where at least one of the toilet bowl 12 of the toilet body 14 and the toilet drainage channel 46, and the tank 400, is covered with moisture-proofing material. Even in this case, the moisture-proofing material can be hidden by the outer wall 26 of the toilet apparatus 10, achieving both good design and moisture-proofing measures.

[0202] At least a portion of the tank 400 is disposed in the first arrangement space 112 described in the first embodiment. The tank 400 includes a first storage section 420 disposed in the first arrangement space 112. In addition, the tank 400 includes a second storage section 422 disposed on at least one side of the first storage section 420 in the left-right direction Y. To satisfy this condition, the second storage section 422 may be disposed in a position shifted in the front-rear direction X with respect to the first arrangement space 112. The second storage section 422 of this embodiment is disposed in a position overlapping the first arrangement space 112 in the front-rear direction X in a side view. This condition is not essential. A storage chamber 424 that stores the liquid L is formed inside the tank 400. The storage chamber 424 is formed continuously inside the first storage section 420 and the second storage section 422.

[0203] The second storage section 422 of this embodiment is provided so as to protrude above the upper surface portion of the first storage section 420, and is arranged in a position overlapping the drainage pipeline 16 in the left-right direction Y. An upper portion of the second storage section 422 is arranged in a position overlapping in the left-right direction Y with a portion of the drainage pipeline 16 provided above the first storage section 420. A portion of the second storage section 422 is provided above the first storage section 420. The second storage sections 422 of this embodiment are arranged individually on both sides of the drainage pipeline 16 in the left-right direction Y.

[0204] At least a portion of the first storage section 420 is provided so as to be above the aforementioned central position P3 of the internal water channel 306 of the drainage pipe line 16. The storage chamber 424 of the tank 400 is also provided so as to satisfy this condition. The liquid level Ls of the liquid L stored in the tank 400 is also provided so as to satisfy this condition. These are also provided so as to satisfy the same condition in relation to the aforementioned lower end position P4 and lower end position P5.

[0205] The tank 400 is provided so as to protrude in the left-right direction Y from the first arrangement space 112. In other words, the tank 400 is provided so as to protrude in the left-right direction Y from a location where the tank 400 overlaps with the drainage pipe 16 in the up-down direction Z when viewed from behind. The tank 400 of this embodiment is provided so as to protrude on both sides in the left-right direction Y from the first arrangement space 112.

[0206] The effects of the toilet device 10 described above will now be described.

[0207] (E1) As described above, the tank 400 is disposed in the first arrangement space 112 behind the ascending pipe 54, which is prone to becoming a dead space. The tank 400 of this embodiment is disposed in the first arrangement space 112 between the ascending pipe 54 and the descending pipe 58, which is particularly prone to becoming a dead space. Therefore, as with (A1) described above, the toilet apparatus 10 can be made more compact than when the tank 400 is disposed in another position. Here, "another position" refers to the third arrangement space 116 described above.

[0208] (E2) The tank 400 is provided so as to protrude from the first arrangement space 112 in the left-right direction Y. Therefore, as described above, a portion of the tank 400 is disposed at a location offset in the left-right direction Y from the first arrangement space 112, which is likely to become dead space. This makes it possible to increase the capacity of the tank 400 without increasing the size of the toilet apparatus 10. In relation to this effect, it is sufficient that the tank 400 protrudes from at least one side of the first arrangement space 112.

[0209] (E3) The tank 400 includes a second storage section 422 in addition to the first storage section 420. Therefore, the capacity of the tank 400 can be increased by the amount of the second storage section 422.

[0210] (E4) The second storage sections 422 are individually disposed on both sides of the drainage pipe 16 in the left-right direction Y. Therefore, the capacity of the tank 400 can be increased by the amount of each of the second storage sections 422.

[0211] Another feature of the toilet apparatus 10 of this embodiment will be described. As in the first embodiment, a second arrangement space 118 for arranging a portion of the drainage pipe 16 is provided below the tank 400. This makes it possible to realize a design in which the drainage pipe 16 is arranged below the tank 400, as in (A2) above. This in turn improves the degree of freedom regarding the arrangement position of the drainage pipe 16.

[0212] In this embodiment, too, a portion of the drain socket 48 is arranged in the second arrangement space 118 as "a portion of the drain pipe 16." Therefore, as in (A3) above, the adjustment margin for the length of the drain socket 48 in the front-to-rear direction X can be increased by the amount of the second arrangement space 118, thereby expanding the range of compatible drain cores.

[0213] (E5) The tank 400 of this embodiment is placed on the mounting portion 122 of the toilet apparatus 10, as in the first embodiment. The tank 400 is fixed to the toilet body 14 using screws or the like (not shown) while placed on the mounting portion 122. The tank 400 is placed at a distance from the floor F and is supported by the toilet body 14. This allows for good workability when installing the tank 400, as in (A4) above.

[0214] The first pipe connection portion 66 of the first pipe line component 62 is disposed above the first arrangement space 112. The first pipe connection portion 66 is connected to the first piping member 64 (the drain socket 48 in this embodiment) provided at the rear of the first arrangement space 112. Therefore, similar to the above-mentioned (A6), when the tank 400 is disposed in the first arrangement space 112, it is not necessary to dispose the liquid supply device 18 in the first arrangement space 112 from below the toilet body 14. In addition, similar to the above-mentioned (A7), the first arrangement space 112 can be wider in the front-to-rear direction X compared to when the first pipe connection portion 66 of the drain pipe 16 is disposed at the rear of the first arrangement space 112.

[0215] (E6) As in the first embodiment, the toilet apparatus 10 is configured so that the tank 400 can be moved horizontally in and out of the first arrangement space 112. As in (A5) above, this means that when placing the tank 400 on the placement portion 122, there is no need to lift or turn the toilet body 14 upside down, resulting in good operability.

[0216] At least a portion of the tank units 404A, 404B is disposed above the tank 400. The tank 400 includes cylindrical pipe receivers 426A, 426B into which the pipes 410A, 410B of the tank units 404A, 404B are inserted. The pipe receivers 426A, 426B include a first pipe receiver 426A into which the first pipe 410A is inserted, and a second pipe receiver 426B into which the second pipe 410B is inserted. A seal member 428 is disposed between the pipes 410A, 410B and the pipe receivers 426A, 426B. The seal member 428 is an elastic body such as an O-ring, and provides a seal between the pipes 410A, 410B and the pipe receivers 426A, 426B. Pipe sections 410A and 410B are liquid-tightly connected to pipe receiving sections 426A and 426B via seal members 428.

[0217] Pipe receiving portions 426A, 426B do not protrude outward from tank 400, but protrude toward storage chamber 424 of tank 400. It can also be said that pipe receiving portions 426A, 426B do not protrude outward from surrounding wall portion 430 provided around pipe receiving portions 426A, 426B of tank 400, but protrude inward from surrounding wall portion 430.

[0218] (E7) This makes it less likely that the pipe receiving portions 426A, 426B will interfere with structures around the tank 400, compared to when the pipe receiving portions 426A, 426B protrude outward from the tank 400. In this embodiment, the "structure" refers to the partition member 32. This allows the peripheral wall portion 430 of the tank 400 to be closer to the structure. Consequently, when the tank 400 is disposed near the structure, the capacity of the tank 400 can be increased.

[0219] Other variations of each component will be described.

[0220] The toilet body 14 may be fixed to the toilet wall W rather than to the toilet floor F. The toilet seat 20 may be attached to the toilet body 14 via a casing 154, or may be attached directly to the toilet body 14.

[0221] The drain pipe 16 does not have to be provided with the drain socket 48. The drain pipe 16 does not have to be provided with the descending pipe 58 downstream of the ascending pipe 54. This is intended, for example, for the case where the toilet drain pipe 46 is connected to a drain pipe 44 embedded in the toilet room wall W.

[0222] The liquid supply device 18 is not particularly limited as long as it can supply liquid to the toilet body 14. The liquid is not limited to flushing water, and may be, for example, liquid detergent. The use of the liquid stored in the liquid supply device 18 is not particularly limited. For example, this liquid may be used in a spray device that sprays liquid into the toilet bowl 12 for the purpose of sterilization, in addition to a private part cleansing device.

[0223] The liquid supply destination of the liquid supply device 18 is not particularly limited as long as it is the toilet body 14. For example, in addition to the toilet bowl 12 of the toilet body 14, the liquid may be supplied to the drain pipe 16 or the like.

[0224] There are no particular limitations on the specific structure for making the length of drain socket 48 adjustable in the front-to-rear direction. For example, a bellows structure that is expandable in the front-to-rear direction may be provided in part of drain socket 48.

[0225] In place of the liquid supply device 18, a circuit board or the like may be arranged in the first arrangement space 112.

[0226] (Regarding the first feature) The liquid supply device 18 may be provided so as not to protrude from the first arrangement space 112 in the left-right direction Y, or may be provided so as to be aligned with the flow direction of the ascending pipe 54. Unlike the embodiment, other parts of the liquid supply device 18 may be provided in the first arrangement space 112.

[0227] The second arrangement space 118 for arranging a part of the drain pipe 16 does not have to be provided below the liquid supply device 18. Unlike the embodiment, the toilet drain channel 46 of the drain pipe 16 may be arranged in the second arrangement space 118.

[0228] The first piping member 64 may be, for example, a drain pipe 44, different from the embodiment.

[0229] The toilet apparatus 10 does not have to include the first partition wall 34 and the second partition wall 182 (partition wall member 32). The first partition wall 34 may be provided separately from the toilet body 14. The second partition wall 182 may be provided in the toilet body 14 as part of the toilet body 14.

[0230] The toilet body 14 does not have to be provided with the mounting portion 122. The liquid supply device 18 may be fixed to the toilet body 14 in a suspended state, for example.

[0231] The toilet apparatus 10 does not have to be configured so that the liquid supply apparatus 18 can be inserted and removed horizontally into and from the first arrangement space 112. The liquid supply apparatus 18 may be inserted and removed from the first arrangement space 112 from below.

[0232] To obtain the effect of (A5), the direction in which the liquid supply device 18 is inserted or removed may be the left-right direction Y, unlike in the embodiment. When the cover member 190 is used, the direction in which the liquid supply device 18 is inserted or removed may be either the left-right direction Y or the front-back direction X. To obtain the effect of (A5), the toilet device 10 does not need to include the mounting portion 122 as part of the toilet body 14. This means that the mounting portion 122 may be provided separately from the toilet body 14.

[0233] The tank 400 may have the first storage section 420 disposed in the first arrangement space 112, and may not have the second storage section 422. The tank 400 may have at least a portion disposed in the first arrangement space 112, and the specific arrangement position and shape are not particularly limited.

[0234] The pipe receiving portions 426A, 426B of the tank 400 may protrude toward the outside of the tank 400.

[0235] There are no particular limitations on the structure to be placed near the peripheral wall portion 430 of the tank 400. For example, it may be the casing 154 of the functional device 150, the toilet body 14, or the like.

[0236] The tank units 404A, 404B may be fixed to the casing 154 of the functional device 150, or may be fixed to a location separate from the casing 154. Here, the "separate location" is, for example, the partition member 32. When the tank units 404A, 404B are fixed to a location separate from the casing 154, the tank units 404A, 404B and the functional device 150 can be handled separately.

[0237] Refer to Fig. 30. In the embodiment of Fig. 2, the descending pipe 58 of the drain pipe 16 is provided in the drain socket 48, and the first arrangement space 112 is provided between the toilet drain passage 46 and the drain socket 48. Alternatively, the first arrangement space 112 may be provided between the ascending pipe 54 and the descending pipe 58 of the toilet drain passage 46. In this modification, the upstream portion of the descending pipe 58 of the drain pipe 16 is provided in the toilet drain passage 46, and the downstream portion of the descending pipe 58 is provided in the drain socket 48.

[0238] See Figure 31. This modified example differs from the embodiment in Figure 2 in that the toilet body 14 is wall-hung. The wall-hung toilet body 14 is fixed to the toilet wall W while hanging from the toilet wall W. The toilet body 14 is positioned at a distance from the floor F. The toilet body 14 of this modified example is also provided with a jet discharge section 80.

[0239] The drain pipe 16 of this modified example is also provided with a descending pipe 58 in addition to the ascending pipe 54. The descending pipe 58 of this modified example descends and extends rearward as it moves downstream. The drain pipe 16 of this example is provided with a rear pipe 78 that extends linearly rearward as it moves downstream from the descending pipe 58 and is connected to the drain pipe 44. The descending pipe 58 and rear pipe 78 are provided in the drain socket 48.

[0240] As in the first embodiment, the drain socket 48 has an upstream connection portion 68 to which the toilet drain channel 46 is connected, and a downstream connection portion 70 to which the drain pipe 44 is connected. Unlike the first embodiment, the upstream connection portion 68 of the drain socket 48 in this embodiment is directly connected to the downstream end of the toilet drain channel 46.

[0241] The first pipe component 62 of this modified example also includes a first pipe connection portion 66 that is connected to the first piping member 64. The first pipe component 62 of this modified example is the toilet body 14, and the first piping member 64 is the drain socket 48. The first pipe connection portion 66 of this modified example also extends rearward.

[0242] As in the first embodiment, at least a portion of the main body 102 of the liquid supply device 18 is disposed in the first arrangement space 112. As in the first embodiment, the first arrangement space 112 of this embodiment is provided between the ascending pipe line 54 and the descending pipe line 58 in side view. Unlike the first embodiment, a portion of the drain pipe line 16 is not disposed in the second arrangement space 118 below the liquid supply device 18.

[0243] In this way, when providing the first arrangement space 112 between the ascending pipe 54 and the descending pipe 58 of the drainage pipe 16, the specific example of the descending pipe 58 is not particularly limited. The descending pipe 58 does not have to be provided behind the first arrangement space 112.

[0244] Please refer to Figure 32. This modified example differs from the embodiment of Figure 27 in that the toilet body 14 is wall-mounted. The drainage pipe 16 of this modified example is also configured in the same way as the example of Figure 31. The tank 400 of this modified example is also arranged in the first arrangement space 112, as in the embodiment of Figure 27. The tank 400 has a first storage section 420 and a second storage section 422 (not shown), as in the modified example of Figure 27.

[0245] This example also includes the components described above in (E1) to (E7), and provides the effects corresponding to those descriptions.

[0246] See Figures 33 and 34. This modified example differs from the embodiment of Figures 28 and 29 in that it includes multiple tank devices 402. The multiple tank devices 402 include a first tank device 402A and a second tank device 402B. The first tank device 402A includes a tank 400 (hereinafter referred to as the first tank 400A) and a valve unit 404A and a pump unit 404B, similar to the second embodiment. The second tank device 402B includes a tank 400 (hereinafter referred to as the second tank 400B) and a valve unit 404A and a pump unit 404B, similar to the second embodiment. In Figure 33, the pump unit 404B of the first tank device 402A and the valve unit 404A of the second tank device 402B are not shown. Both the first tank 400A and the second tank 400B are disposed within the first cavity 28 of the toilet device 10.

[0247] The first tank 400A and the second tank 400B store liquids L for different purposes. In this embodiment, the first tank 400A stores flush water for toilet flushing as the liquid L, and the second tank 400B stores water for a local cleaning device as the liquid L. The flush water for toilet flushing is supplied to the toilet bowl 12 of the toilet body 14, thereby discharging waste within the toilet bowl 12 and cleaning the inside of the toilet bowl 12. The water for the local cleaning device is supplied into the toilet bowl 12 of the toilet body 14 via the local cleaning device.

[0248] The first tank 400A includes a first storage section 420 disposed in the first arrangement space 112, as well as a single second storage section 422 disposed on one side of the first storage section 420 in the left-right direction Y.

[0249] Unlike the second embodiment, the second tank 400B is not disposed in the first arrangement space 112, but is disposed on the opposite side of the first storage section 420 of the first tank 400A from the second storage section 422 in the left-right direction Y. The upper part of the second tank 400B is disposed on the opposite side of the drainage pipe 16 from the second storage section 422 of the first tank 400A in the left-right direction Y.

[0250] This example also includes the components described in (E1) to (E3) and (E5) to (E7) above, and provides the effects corresponding to those descriptions. In addition, when liquids L for different purposes are stored in multiple tanks 400, the capacity of one tank 400 can be increased by the amount of the tanks 400 disposed in the first arrangement space 112.

[0251] Specific examples of the liquid L stored in the multiple tanks 400 are not particularly limited. For example, one of the tanks 400 may store the liquid L for the spray device described above. In addition to flush water supplied from a water supply, purified water obtained by purifying flush water using a modifier such as a filter medium may be used as the liquid L. Using purified water has the advantage that limescale components adhering to the toilet body 14 can be removed by the purified water. In addition, liquid detergent may be used as the liquid L. This liquid detergent cleans the inside of the toilet bowl 12 by being supplied into the toilet bowl 12 of the toilet body 14, for example. Water for the private parts washing device may be stored in the tank 400 as warm water by heating it in advance. This allows for a larger flow rate of warm water to be sprayed from the private parts washing device.

[0252] Unlike the embodiment, the pump unit 404B may supply the liquid L to the toilet body 14 via a mechanical device such as a private parts cleansing device or a spray device. In this case, such a mechanical device is provided on the second liquid path 406B described above.

[0253] (Regarding the second feature) The first cavity 28 and the second cavity 40 may each have a rear wall that separates the interior and exterior spaces of each cavity 28, 40 in the front-to-rear direction. In this case, the first cavity 28 may have a first rear opening 162, and the second cavity 40 may have a second rear opening 166.

[0254] The rear end portion 30a of the outer wall portion 30 may be directly abutted against the toilet room wall portion W without the cushion material 176. The rear end portion 30a of the outer wall portion 30 does not have to have the notch portion 178 formed therein. The notch portion 178 may be formed in a location other than the lower end portion of the outer wall portion 30.

[0255] To obtain the effect of (B1) described above, the toilet apparatus 10 may be fixed in a state where the rear end of the outer wall 30 of the toilet apparatus 10 does not abut against the toilet room wall W. This assumes that there is a gap between the toilet room wall W and the outer wall 30 of the toilet apparatus 10.

[0256] In order to obtain the effect (B2) described above, the first cavity 28 of the toilet apparatus 10 does not have to be provided with the upper opening 160 and the first rear opening 162.

[0257] To obtain the effects (B1) and (B2) described above, the position of the liquid supply device 18 is not particularly limited. The liquid supply device 18 may be disposed in the third arrangement space 116 of the first cavity 28 and the second cavity 40. The liquid supply device 18 may not be present.

[0258] See Figures 35 and 36. The toilet apparatus 10 of this modified example is equipped with a waterproof cover member 188 that covers and closes the continuous opening 186 of the toilet body 14. This prevents water and other liquids from entering the interior of the toilet body 14 through the continuous opening 186 of the toilet body 14. As a result, electrical components 204 and other components arranged inside the toilet body 14 can be protected. The cover member 188 of this modified example is provided in a position aligned with the rear end 30a of the outer wall 30 of the toilet body 14 in the front-to-rear direction X. Alternatively, the cover member 188 may be provided further forward than the rear end 30a of the outer wall 30 of the toilet body 14.

[0259] The toilet body 14 of this example is also fixed with the outer wall 30 of the toilet device 10 in contact with the toilet room wall W. This provides the effect of (B2) described above.

[0260] Unlike the embodiment, the first rear opening 162 and the second rear opening 166 do not have to be continuous with each other.

[0261] Additionally, when using a wall-hung toilet body 14, a cover member may be used that covers and closes the internal space of the first cavity 28 from below. This cover member is intended to cover and close the through-hole 120 (see Figure 3) of the toilet body 14, for example.

[0262] See Figure 37. In this modified example, a portion of the outer wall portion 30 is formed by a cover member 190 that is provided separately from the toilet body 14. In this modified example, a pair of cover members 190 form a portion of each of the pair of outer wall portions 30. The cover member 190 forms the outer wall portion 30 in a range extending from the rear end portion 30a of the outer wall portion 30 in the front-rear direction X. The cover member 190 in this modified example forms a portion of the first cavity portion 28.

[0263] The cover member 190 is removably fixed to the toilet body 14 via a fastener 192. The toilet body 14 is provided with a plurality of fixed portions 191 that fasten the cover member 190 at intervals in the front-to-back direction X. The fastener 192 in this modified example is made up of a pair of hook-and-loop fasteners that are attached to the toilet body 14 and the cover member 190 at positions that face each other in the left-to-right direction Y. The fastener 192 fixes the cover member 190 to the toilet body 14 so that the relative position of the cover member 190 to the toilet body 14 in the front-to-back direction X can be adjusted. Specific examples of the fastener 192 that satisfy this condition are not particularly limited. Other specific examples include the fastener 192 being a combination of a bolt and an elongated hole, a magnet, etc.

[0264] This allows the rear end 30a of the outer wall 30 formed by the cover member 190 to abut against the toilet wall W while adjusting the position of the toilet body 14 in the front-to-rear direction X relative to the toilet wall W. By adjusting the position of the toilet body 14 in the front-to-rear direction X in this way, the position of the drain pipe 16 can also be adjusted, making it possible to accommodate variations in the position of the drain core in the front-to-rear direction X. In other words, even when the outer wall 30 of the toilet apparatus 10 is abutted against the toilet wall W, it is possible to accommodate variations in the position of the drain core by changing the position of the toilet body 14 in the front-to-rear direction X.

[0265] 37, the cover member 190 may constitute the entire outer wall portion 30. In this way, it is sufficient that the cover member 190 constitutes at least a part of the outer wall portion 30.

[0266] The example described here is one in which the cover member 190 constitutes the entire range of the outer wall portion 30 in the vertical direction Z. Alternatively, a portion of the range of the outer wall portion 30 in the vertical direction Z may be constituted by the cover member. In this case, the other range of the outer wall portion 30 in the vertical direction Z is constituted by the toilet body 14. In this case, the portion of the cover member that constitutes the rear end portion 30a of the outer wall portion 30 and the portion of the toilet body 14 that constitutes the rear end portion 30a of the outer wall portion 30 may be provided flush with each other. In this case, the cover member may be fixed to either the toilet body 14 or the casing 154 of the functional device 150 using the fastener 192 described above.

[0267] (Regarding the third feature) In the above example, the rear space 220 is the third arrangement space 116 inside the first cavity 28. If the toilet apparatus 10 does not have the first cavity 28, the rear space 220 may be formed between the toilet chamber wall W and the toilet body 14. The functional component 152 does not have to be arranged in the rear space 220.

[0268] The high region 216 and the low region 218 of the upper surface 24 of the toilet body 14 may be formed by a step portion instead of the inclined surface 214. This step portion is provided, for example, so that the height decreases in stages toward the front.

[0269] To achieve the effect of (C1) described above, the position of the low region 218 on the upper surface 24 of the toilet body 14 is not particularly limited. For example, as shown in FIG. 38A, the low region 218 may be provided in only a portion of the range in the front-to-back direction X that overlaps with the overflow edge 208 in the left-to-right direction Y in a plan view. Alternatively, as shown in FIG. 38B, the low region 218 may be provided in only a portion of the range in the left-to-right direction Y that overlaps with the overflow edge 208 in the front-to-back direction X in a plan view. In any case, it is sufficient that the low region 218 be able to guide water that flows over the low point 208b of the overflow edge 208 to the outside of the toilet body 14 without passing through the rear space 220. It can be understood that the low region 218 may be able to guide water that flows over the low point 208b of the overflow edge 208 to either the front or side of the toilet body 14. In both the examples of Figures 38A and 38B, the high region 216 of the upper surface portion 24 of the toilet body 14 is provided parallel to the horizontal plane.

[0270] The inclined surface 214 of the toilet body 14 does not have to be uniformly inclined. The gradient of the inclined surface 214 may vary depending on the position in the front-to-rear direction. For example, the inclined surface forming the high region 216 and the inclined surface forming the low region 218 may have different gradients.

[0271] Unlike the embodiment, the inclined surface 214 may be inclined so that the lowest position is at a midpoint in the front-to-rear direction of the upper surface portion 24. Unlike the embodiment, the inclined surface 214 may be inclined so that the highest position is at a midpoint in the front-to-rear direction of the upper surface portion 24. For example, the highest position of the inclined surface 214 may be behind the toilet bowl 12 of the toilet body 14, and the lowest position of the inclined surface 214 may be at the front end 24b of the upper surface portion 24. The inclined surface 214 that satisfies this condition may be uniformly inclined.

[0272] The toilet seat 20 may be supported at a location other than the inclined surface 214 of the upper surface portion 24 of the toilet body 14.

[0273] In the above example, the "one circumferential side" which is the discharge direction of the first discharge hole 250A is counterclockwise, and the "other circumferential side" is clockwise. Alternatively, the "one circumferential side" which is the discharge direction of the first discharge hole 250A may be clockwise, and the "other circumferential side" may be counterclockwise. In this case, the terms "counterclockwise" and "clockwise" in the embodiment may be interpreted as being replaced with the terms "clockwise" and "counterclockwise", respectively.

[0274] Regarding the height difference of the upper surface 24 of the toilet body 14, when explaining an example in which the height becomes lower toward "one side in the front-to-rear direction," an example was explained in which this "one side in the front-to-rear direction" is the front side. Alternatively, the "one side in the front-to-rear direction" may be the rear side. In other words, the upper surface 24 of the toilet body 14 may be provided so that it becomes lower toward the rear side (i.e., one side in the front-to-rear direction) so that the overflow edge 208 has a height difference. In this case, the front portion of the rim portion 242 usually has a wider range in the up-down direction than the rear portion.

[0275] See Figure 39. In this case, the first divided region Da1 is provided in the rear divided region (i.e., on one side in the front-to-rear direction) adjacent to one side in the circumferential direction (counterclockwise in the illustration) of the front-to-rear center line Lc2, and the remaining divided regions are provided in order from the first divided region Da1 to one side in the circumferential direction. In this case, to obtain the effect of (C2) described above, it is advisable to provide the first discharge hole 250A in one of the divided regions Da2 to Da5 on the opposite side of the second reference line Lc4 from the first divided region Da1, as described above. This makes it easier to wash the front portion of the rim portion 242 well with strong flush water, even if the range in the up-down direction to be washed in the front portion of the rim portion 242 is wide.

[0276] (Regarding the fourth ingenuity) Unlike the embodiment, the second pipe component 300 may be the connection pipe 50, etc. Unlike the embodiment, the second pipe member 302 may be the drain pipe 44, the drain socket 48, etc.

[0277] The axis C1 of the water channel forming surface 310 may be provided concentrically with the axis C2 of the second pipe connecting portion 304 in a specific cross section passing through the water channel top portion 314.

[0278] In order to offset the axis C1 of the water channel forming surface 310 upward relative to the axis C2 of the second pipe connecting portion 304 in a specific cross section passing through the water channel top portion 314, it is not necessary to provide a flat surface 330 on the inner lower surface of the water channel forming surface 310. For example, an upwardly convex arc surface or the like may be provided on the inner lower surface of the water channel forming surface 310.

[0279] In the above example, when the flat surface 330 is provided on the inner lower surface of the water channel forming surface 310, the flat surface 330 is configured by the second pipe component member 300. The flat surface 330 may be configured by a member separate from the second pipe component member 300, for example, the second piping member 302.

[0280] The hollow portion 322 may not be provided below the water channel forming surface 310 inside the second pipe connecting portion 304. The outer peripheral surface of the second pipe connecting portion 304 does not have to be circular, and may be, for example, polygonal.

[0281] The overflow edge 316 may be configured as the apex of an arc-shaped region that extends in an arc toward the downstream side within the drainage pipe 16.

[0282] The water channel crest 314 does not necessarily have to be provided with the water drop section 340. For example, the water channel crest 314 may be provided with a curved surface that becomes continuously lower toward the downstream side.

[0283] Refer to Figure 40. This modified example differs from the embodiment of Figure 12 in the structure around the second pipe connection portion 304 of the second pipe line component 300. In this modified example, the second pipe line component 300 is the toilet body 14, just like the embodiment of Figure 12. In contrast, the second pipe member 302 is the drain socket 48, unlike the embodiment of Figure 12.

[0284] In this modified example, the water channel crest 314 does not have a linear region 318 (see FIG. 12) that extends linearly downstream. The downstream end of the water channel crest 314 can also be considered to be formed by the downstream end of the upflow surface 312.

[0285] The highest point 314a of the water channel top 314 is located upstream of the downstream end face 304a of the second pipe connection part 304 in the drainage pipe 16. As in the embodiment of Figure 12, the water channel top 314 of this modified example is provided with a water drop-off part 340 that gradually decreases downstream in the internal water channel 306. The water drop-off part 340 of this modified example is provided so as to create a discontinuous height difference between the inner lower surface of the second pipe connection part 304 and the water channel top 314. The water drop-off part 340 of this modified example is provided inside the second pipe connection part 304, upstream of the internal space of the downcomer pipe 58 of the drainage pipe 16.

[0286] This allows a larger space 380 to be secured in the internal water channel 306 downstream of the highest point 314a of the water channel top 314, compared to when the highest point 314a of the water channel top 314 is aligned with the downstream end face 304a of the second piping connection portion 304. This space 380 is formed between the second piping member 302 and the water channel top 314, on the horizontal opposite side of the water seal 56 relative to the water channel top 314. This makes it easier for water that overflows the water channel top 314 to flow downstream in the internal water channel 306, making it easier to secure a large drainage flow rate. In particular, when the inner wall surface of the second piping member 302 is located close to the downstream end face 304a of the water channel top 314, it is difficult to secure a larger space 380 in the internal water channel 306 downstream of the highest point 314a of the water channel top 314. Even in such cases, the effects described herein can be effectively obtained.

[0287] In addition, the second pipe connecting portion 304 can be made longer in the flow direction of the internal water channel 306 compared to when the downstream end face 304a of the second pipe connecting portion 304 is positioned to coincide with the apex point 314a of the water channel top 314. As a result, the length of the second pipe connecting portion 304 necessary to ensure sealing between the second pipe connecting portion 304 and the second pipe connecting portion 304 can be secured.

[0288] Refer to Figure 41. In this modified example, as in the modified example of Figure 40, a water drop portion 340 is provided at the water channel top portion 314 of the second pipe component member 300. This modified example differs from the modified example of Figure 40 in the structure of the drain socket 48. In this modified example, the drain socket 48 includes an inclined pipe portion 382 provided in the descending pipe line 58, and a first straight pipe portion 384 provided in the descending pipe line 58.

[0289] The diagonal pipe section 382 is provided at a position rearward of the first arrangement space 112 and overlapping with the first arrangement space 112 in the front-to-rear direction. The diagonal pipe section 382 is provided so as to extend diagonally downward, more specifically, rearward and downward, toward the downstream side. The cross-sectional area of ​​the inner peripheral surface of the diagonal pipe section 382, ​​taken perpendicular to the pipe axis direction, gradually decreases toward the downstream side. The first straight pipe section 384 is connected to the downstream side of the diagonal pipe section 382 and extends vertically downward toward the downstream side. A boundary portion 386 between the diagonal pipe section 382 and the first straight pipe section 384 is provided at a position rearward of the first arrangement space 112 and overlapping with the first arrangement space 112 in the front-to-rear direction.

[0290] The upstream connection portion 68 of the drain socket 48 includes a second straight pipe portion 388 that extends linearly and to which an elastic member 69 is attached. The diagonal pipe line portion 382 is connected to the downstream side of the second straight pipe portion 388. The acute angle θ1 formed by the central axis CL3 of the upstream end of the diagonal pipe line portion 382 with respect to the central axis CL2 of the second straight pipe portion 388 is set to be 30° or greater.

[0291] The advantages of this are explained below. Consider a case where an object such as toilet paper dropped from the water drop portion 314 of the water channel top 314 lands on the inner lower surface of the diagonal pipe section 382. In this case, because the diagonal pipe section 382 is configured to extend diagonally downward, it is easier to flush the object on its inner lower surface downstream. Therefore, compared to when the second straight pipe section 388 of the drain socket 48 is provided over a wider area, the object dropped from the water drop portion 314 is less likely to clog. At the same time, compared to when the drain socket 48 does not have the diagonal pipe section 382, ​​the first arrangement space 112 can be wider in the front-to-rear direction. Therefore, it is possible to increase the size of the liquid supply device 18 placed in the first arrangement space 112.

[0292] To achieve this effect, it is preferable to satisfy the following conditions. The maximum flow rate of water flowing down from the water drop section 340 during one flushing operation is called Lmax (liters / sec). Here, one flushing operation refers to the operation of supplying a predetermined amount of water from a water supply device (not shown) to flush the toilet bowl 12. The upstream end 382a on the inner lower surface of the inclined pipe section 382 is located at a position where it will not be hit by the water flow of maximum flow rate Lmax when it flows down in a parabolic curve from the water drop section 314.

[0293] In addition, from the viewpoint of obtaining the above-mentioned effects, it is preferable that the upstream end 382a of the diagonal pipe section 382 satisfy the following condition: Specifically, it is preferable that the upstream end 382a of the diagonal pipe section 382 be located downstream of the highest point 314a of the water channel top 314 and within a range of 20 mm in the horizontal direction, and more preferably within a range of 10 mm.

[0294] (Regarding the fifth feature) The accessory device 500 may be any device that is attached to the toilet body 14, and there are no particular limitations on its specific example. The accessory device 500 may be, for example, a functional part other than the valve unit 153, or the liquid supply device 18 described above.

[0295] Unlike the embodiment, the connected device 502 may be placed in the internal space 506 of the toilet apparatus 10. In this case, the cord-like member 504 is placed only in the internal space 506 of the apparatus and is not drawn out from the internal space 506 to the outside. The connected device 502 placed in the internal space 506 may be, for example, an anti-freeze heater that prevents the water in the toilet drainage channel 46 from freezing, or a hot water heater that heats water to produce hot water. In addition, the connected device 502 placed in the internal space 506 may be, for example, a power source such as a motor used in a private parts cleansing device, a deodorizing device, etc.

[0296] There are no particular limitations on the specific example of the cord-like member 504. The cord-like member 504 may be arranged above the drainage pipe 16 in a position overlapping the drainage pipe 16 in the vertical direction. The drainage pipe 16 does not have to be provided with the descending pipe 58. This means that the cord-like member 504 does not have to be arranged in front of the descending pipe 58.

[0297] The withdrawal hole 516 may be formed in a step portion 510 provided in the rear wall portion of the outer peripheral wall portion 26. Unlike the embodiment, the withdrawal hole 516 may be formed partially on the outer surface of the upper portion 512. Unlike the embodiment, the withdrawal hole 516 may be formed partially on the outer surface of the lower portion 514. Unlike the embodiment, the withdrawal hole 516 may be formed only on one side, left or right, of the left-right center position Px of the toilet body 14. The withdrawal hole 516 does not have to have an opening 526.

[0298] The outer peripheral wall portion 26 of this embodiment constitutes a part of the toilet body 14. Either the entire outer peripheral wall portion 26 or a part of the outer peripheral wall portion 26 may be provided separately from the toilet body 14.

[0299] The toilet body 14 does not have to have the hollow portion 520. The cord-like member 504 may be pulled out from the pull-out hole 516 to the outside without passing through the hollow portion 520 of the toilet body 14.

[0300] The outer peripheral wall 26 may include a rear wall that separates the internal space of the outer peripheral wall 26 (internal space 506 of the device) from the external space in the front-rear direction X. When the aforementioned specific direction is considered to be the front-rear direction X, the outer wall 532 facing outward in the aforementioned specific direction corresponds to the rear wall of the outer peripheral wall 26. In this case, a step 510 may be formed in the outer wall 532 (rear wall), and the extraction hole 516 may be provided in a range below the step 510. In this case, the extraction hole 516 may be located at a position hidden by the outer wall 532 when viewed from the reference direction Pg on the aforementioned specific cross section.

[0301] Refer to Figure 42. The connected devices 502 include a first connected device 502A and a second connected device 502B. The first connected device 502A is a stop valve, as in the embodiment of Figure 17. The second connected device 502B is an outlet that serves as an external power source that supplies commercial power. As in the embodiment of Figure 17, each connected device 502A, 502B is arranged on the other side in the left-right direction Y (the right side in this modified example) of the left-right center position Px of the toilet body 14.

[0302] The rope-like member 504 includes a first rope-like member 504A that connects the accessory device 500 and the first connected device 502A, and a second rope-like member 504B that connects the accessory device 500 and the second connected device 502B. The first rope-like member 504A is a hose that supplies water, as in the embodiment of FIG. 17. The second rope-like member 504B is a cable that transmits power. The second rope-like member 504B supplies power from an outlet serving as the second connected device 502B to a power supply circuit (not shown) mounted in the accessory device 500. The power supply circuit supplies power supplied from an external power source to other accessory devices.

[0303] The multiple cord-like members 504 pass through the common first insertion hole 522A and are pulled out to the outside from the common first pull-out hole 516A. Therefore, compared to when the multiple cord-like members 504 are pulled out from individual pull-out holes 516, the structure of the toilet apparatus 10 can be simplified.

[0304] The multiple cord-like members 504 are arranged so as to cross in the left-right direction across the overlap position Pc where they vertically overlap with the drainage pipe 16. Therefore, even when there are multiple cord-like members 504, there is no need to secure space to arrange the cord-like members 504 behind the toilet body 14. Accordingly, even when there are multiple cord-like members 504, the forward projection dimension of the toilet apparatus 10 can be reduced, as described above.

[0305] As such, there is no particular limitation on the number of cord-like members 504. When there are multiple cord-like members 504, it is sufficient that at least one cord-like member 504 is arranged so as to cross a position that overlaps with the drainage pipe 16 in the vertical direction. The multiple cord-like members 504 may be pulled out to the outside from individual pull-out holes 516, unlike the modified example of Figure 42.

[0306] See FIG. 43. The withdrawal hole 516 is formed below the step portion 510 in the outer peripheral wall portion 26. More specifically, the withdrawal hole 516 is formed in the lower portion 514 of the outer peripheral wall portion 26. The withdrawal hole 516 in this example is also formed in the outer peripheral wall portion 26 in a range below the step portion 510. The withdrawal hole 516 in this example is formed by the aforementioned cutout portion 178. Like the cutout portion 178, the withdrawal hole 516 in this embodiment has an opening 526 that opens rearward and downward. The cord-like member 504 is drawn out from the withdrawal hole 516 to the outside via the first cavity portion 28 and the second cavity portion 40. As a result, similar to the effect (F) described above, the withdrawal hole 516 is hidden by the upper portion 512 of the outer peripheral wall portion 26, making it difficult to see when observing the toilet apparatus 10 from the outside.

[0307] The above has described the embodiments and modifications in detail. The above-described embodiments and modifications are merely illustrative examples. The shapes referred to in this specification naturally include shapes that deviate from the shapes referred to by errors such as dimensional errors and manufacturing errors. The contents of the embodiments and modifications are subject to many design changes, such as changing, adding, or deleting components. In the above-described embodiments, the contents that are subject to such design changes are emphasized by adding the notation "embodiment." However, design changes are also permitted even in contents that are not so notated. Hatching on cross sections in the drawings does not limit the material of the hatched objects.

[0308] Any combination of the above components is also effective. For example, the embodiment may be combined with any of the descriptions of other embodiments and modifications. In addition, the modification may be combined with any of the descriptions of the embodiment and other modifications.

[0309] The following is a summary of each claim in the original application. (Claim 1) a toilet body having a toilet bowl portion and fixed to the floor surface of a toilet room; a hollow portion provided behind the toilet bowl portion and accommodating functional components; a pair of outer wall portions each having the cavity formed therein and disposed laterally with a space therebetween; an upper opening provided in the hollow portion and opening upward; a rear opening provided in the cavity portion and opening the upper opening rearward. (Claim 2) the cavity is a first cavity, the rear opening is a first rear opening, a toilet drainage channel provided in the toilet body; a drain socket that connects a drain pipe embedded in the floor surface to the toilet drainage channel; a second cavity portion in which the drain socket is accommodated; 2. The toilet apparatus according to claim 1, wherein the second cavity is provided with a lower opening that opens downward and a second rear opening that opens the lower opening rearward. (Claim 3) 3. The toilet apparatus of claim 2, further comprising a continuous opening that continues from the upper opening to the lower opening and constitutes the first rear opening and the second rear opening. (Claim 4) The first cavity does not have a rear wall portion that separates the internal space and the external space of the first cavity in the front-rear direction, 4. The toilet apparatus according to claim 2, wherein the second cavity does not have a rear wall separating the internal space and the external space of the second cavity in the front-rear direction. (Claim 5) A functional device is provided in the toilet body, the functional device includes the functional component and a casing that houses the functional component; A toilet device as described in any one of claims 1 to 4, wherein the rear end of the outer wall portion is located either in a position aligned in the front-to-rear direction with the rear end of the functional device when viewed from the side, or in a position rearward of the rear end of the functional device. (Claim 6) 6. The toilet apparatus according to claim 1, wherein the toilet body is fixed to the floor surface with the rear end of the outer wall portion abutting against a wall of the toilet room. (Claim 7) a toilet body having a toilet bowl portion and fixed to the floor surface of a toilet room; a hollow portion provided behind the toilet bowl portion and accommodating functional components; The toilet device comprises a pair of outer wall portions, the hollow portion being provided inside, arranged on the left and right at a distance, and having their rear ends abutted against the wall portion of the toilet room. (Claim 8) a toilet drainage channel provided in the toilet body; 8. The toilet apparatus according to claim 6, further comprising a drain socket for connecting a drain pipe to the toilet drainage channel. (Claim 9) 9. The toilet apparatus according to claim 6, wherein a rear end of the outer wall portion is abutted against a wall portion of the toilet room via a cushion material. (Claim 10) 10. The toilet apparatus according to claim 1, wherein a notch is formed in the rear end of the outer wall portion, allowing the internal space of the toilet apparatus to communicate with the external space. (Claim 11) a drainage pipe connected to the bottom of the toilet bowl; The functional part; 11. The toilet apparatus according to claim 1, further comprising: a partition portion disposed between the drainage pipe and the functional component, and integrated with the toilet body. (Claim 12) 12. The toilet apparatus according to claim 1, wherein at least a portion of the outer wall portion is configured by a cover member that is provided separately from the toilet body. (Claim 13) an extraction hole formed in the outer wall portion; a cord-like member that is drawn from the inside of the outer wall portion to the outside through the drawing hole, the extraction hole has an opening that opens in a direction intersecting the axial direction of the cord-like member, 13. The toilet apparatus according to any one of claims 1 to 12, wherein a middle portion of the cord-like member is capable of being inserted and removed through the opening between the withdrawal hole and the external space. [Explanation of symbols]

[0310] 10...toilet device, 12...toilet bowl portion, 14...toilet body, 16...drainage pipe, 18...liquid supply device, 20...toilet seat, 24...upper surface portion, 26...outer peripheral wall portion, 28...first cavity portion, 30...outer wall portion, 34...first partition wall portion, 40...second cavity portion, 44...drainage pipe, 46...toilet drainage pipe, 48...drainage socket, 52...seal water storage portion, 54...ascending pipe line, 56...seal water, 58...descending pipe line, 62...first pipe component, 64...first piping member, 66...first piping connection portion, 98...pressure accumulator, 100 ...vacuum breaker, 102...main body, 112...first arrangement space, 118...second arrangement space, 122...placing portion, 124...entrance / exit, 150...functional device, 152...functional part, 154...casing, 160...upper opening, 162...first rear opening, 164...lower opening, 166...second rear opening, 176...cushion material, 178...cutout portion, 182...second partition wall portion, 190...cover member, 204...electrical component, 208...overflow edge, 210...middle area, 214...inclined surface, 216...high region, 218...low region, 220...rear space, 250A...first discharge hole, 252A...first discharge portion, 300...second pipe component, 302...second piping member, 304...second piping connection portion, 306...internal water channel, 310...water channel forming surface, 314...top portion, 316...overflow edge, 322...hollow portion, 330...flat surface, 340...water drop portion, 366...rear mold, 370...molded recess, 372...molded protrusion, 400...tank, 404A, 404B...tank unit , 410A, 410B...piping section, 420...first storage section, 422...second storage section, 424...storage chamber, 426A, 426B...piping receiving section, 428...surrounding wall section, 500...accessory equipment, 502...mating equipment, 504...cord-like member, 510...step section, 512...upper part, 516...withdrawal hole, 520...hollow section, 524...entrance / exit section, Da1 to Da8...first divided area to eighth divided area, Lc1...left-right center line, Lc2...front-to-back center line, Lc3...first reference line, Lc4...second reference line.

Claims

[Claim 1] a toilet body having a toilet bowl portion and fixed to the floor surface of a toilet room; a hollow portion provided behind the toilet bowl portion and accommodating functional components; a pair of outer wall portions each having the cavity formed therein and disposed laterally with a space therebetween; an upper opening provided in the hollow portion and opening upward; a rear opening provided in the cavity portion and opening the upper opening rearward.

Images